X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/e9d988989fe37ab8c5f903e47fbe36e6e00dc51f..refs/tags/wordpress-4.3.1:/wp-includes/taxonomy.php diff --git a/wp-includes/taxonomy.php b/wp-includes/taxonomy.php index d9ae2d5a..4328a366 100644 --- a/wp-includes/taxonomy.php +++ b/wp-includes/taxonomy.php @@ -2,9 +2,10 @@ /** * Taxonomy API * + * @since 2.3.0 + * * @package WordPress * @subpackage Taxonomy - * @since 2.3.0 */ // @@ -12,33 +13,65 @@ // /** - * Creates the initial taxonomies when 'init' action is fired. + * Creates the initial taxonomies. + * + * This function fires twice: in wp-settings.php before plugins are loaded (for + * backwards compatibility reasons), and again on the {@see 'init'} action. We must + * avoid registering rewrite rules before the {@see 'init'} action. + * + * @since 2.8.0 + * + * @global WP_Rewrite $wp_rewrite The WordPress rewrite class. */ function create_initial_taxonomies() { global $wp_rewrite; + if ( ! did_action( 'init' ) ) { + $rewrite = array( 'category' => false, 'post_tag' => false, 'post_format' => false ); + } else { + + /** + * Filter the post formats rewrite base. + * + * @since 3.1.0 + * + * @param string $context Context of the rewrite base. Default 'type'. + */ + $post_format_base = apply_filters( 'post_format_rewrite_base', 'type' ); + $rewrite = array( + 'category' => array( + 'hierarchical' => true, + 'slug' => get_option('category_base') ? get_option('category_base') : 'category', + 'with_front' => ! get_option('category_base') || $wp_rewrite->using_index_permalinks(), + 'ep_mask' => EP_CATEGORIES, + ), + 'post_tag' => array( + 'hierarchical' => false, + 'slug' => get_option('tag_base') ? get_option('tag_base') : 'tag', + 'with_front' => ! get_option('tag_base') || $wp_rewrite->using_index_permalinks(), + 'ep_mask' => EP_TAGS, + ), + 'post_format' => $post_format_base ? array( 'slug' => $post_format_base ) : false, + ); + } + register_taxonomy( 'category', 'post', array( 'hierarchical' => true, - 'update_count_callback' => '_update_post_term_count', 'query_var' => 'category_name', - 'rewrite' => did_action( 'init' ) ? array( - 'hierarchical' => true, - 'slug' => get_option('category_base') ? get_option('category_base') : 'category', - 'with_front' => ( get_option('category_base') && ! $wp_rewrite->using_index_permalinks() ) ? false : true ) : false, + 'rewrite' => $rewrite['category'], 'public' => true, 'show_ui' => true, + 'show_admin_column' => true, '_builtin' => true, ) ); register_taxonomy( 'post_tag', 'post', array( 'hierarchical' => false, - 'update_count_callback' => '_update_post_term_count', 'query_var' => 'tag', - 'rewrite' => did_action( 'init' ) ? array( - 'slug' => get_option('tag_base') ? get_option('tag_base') : 'tag', - 'with_front' => ( get_option('category_base') && ! $wp_rewrite->using_index_permalinks() ) ? false : true ) : false, + 'rewrite' => $rewrite['post_tag'], 'public' => true, 'show_ui' => true, + 'show_admin_column' => true, '_builtin' => true, ) ); @@ -72,6 +105,12 @@ function create_initial_taxonomies() { 'add_or_remove_items' => null, 'choose_from_most_used' => null, ), + 'capabilities' => array( + 'manage_terms' => 'manage_links', + 'edit_terms' => 'manage_links', + 'delete_terms' => 'manage_links', + 'assign_terms' => 'manage_links', + ), 'query_var' => false, 'rewrite' => false, 'public' => false, @@ -79,12 +118,6 @@ function create_initial_taxonomies() { '_builtin' => true, ) ); - $rewrite = false; - if ( did_action( 'init' ) ) { - $rewrite = apply_filters( 'post_format_rewrite_base', 'type' ); - $rewrite = $rewrite ? array( 'slug' => $rewrite ) : false; - } - register_taxonomy( 'post_format', 'post', array( 'public' => true, 'hierarchical' => false, @@ -93,28 +126,28 @@ function create_initial_taxonomies() { 'singular_name' => _x( 'Format', 'post format' ), ), 'query_var' => true, - 'rewrite' => $rewrite, + 'rewrite' => $rewrite['post_format'], 'show_ui' => false, '_builtin' => true, - 'show_in_nav_menus' => false, + 'show_in_nav_menus' => current_theme_supports( 'post-formats' ), ) ); } -add_action( 'init', 'create_initial_taxonomies', 0 ); // highest priority /** - * Get a list of registered taxonomy objects. + * Retrieves a list of registered taxonomy names or objects. * - * @package WordPress - * @subpackage Taxonomy * @since 3.0.0 - * @uses $wp_taxonomies - * @see register_taxonomy * - * @param array $args An array of key => value arguments to match against the taxonomy objects. - * @param string $output The type of output to return, either taxonomy 'names' or 'objects'. 'names' is the default. - * @param string $operator The logical operation to perform. 'or' means only one element - * from the array needs to match; 'and' means all elements must match. The default is 'and'. - * @return array A list of taxonomy names or objects + * @global array $wp_taxonomies The registered taxonomies. + * + * @param array $args Optional. An array of `key => value` arguments to match against the taxonomy objects. + * Default empty array. + * @param string $output Optional. The type of output to return in the array. Accepts either taxonomy 'names' + * or 'objects'. Default 'names'. + * @param string $operator Optional. The logical operation to perform. Accepts 'and' or 'or'. 'or' means only + * one element from the array needs to match; 'and' means all elements must match. + * Default 'and'. + * @return array A list of taxonomy names or objects. */ function get_taxonomies( $args = array(), $output = 'names', $operator = 'and' ) { global $wp_taxonomies; @@ -124,27 +157,25 @@ function get_taxonomies( $args = array(), $output = 'names', $operator = 'and' ) return wp_filter_object_list($wp_taxonomies, $args, $operator, $field); } - /** * Return all of the taxonomy names that are of $object_type. * * It appears that this function can be used to find all of the names inside of * $wp_taxonomies global variable. * - * Should - * result in Array('category', 'post_tag') + * `` Should + * result in `Array( 'category', 'post_tag' )` * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 * - * @uses $wp_taxonomies + * @global array $wp_taxonomies The registered taxonomies. * - * @param array|string|object $object Name of the type of taxonomy object, or an object (row from posts) - * @param string $output The type of output to return, either taxonomy 'names' or 'objects'. 'names' is the default. + * @param array|string|WP_Post $object Name of the type of taxonomy object, or an object (row from posts) + * @param string $output Optional. The type of output to return in the array. Accepts either + * taxonomy 'names' or 'objects'. Default 'names'. * @return array The names of all taxonomy of $object_type. */ -function get_object_taxonomies($object, $output = 'names') { +function get_object_taxonomies( $object, $output = 'names' ) { global $wp_taxonomies; if ( is_object($object) ) { @@ -174,15 +205,12 @@ function get_object_taxonomies($object, $output = 'names') { * The get_taxonomy function will first check that the parameter string given * is a taxonomy object and if it is, it will return it. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 * - * @uses $wp_taxonomies - * @uses taxonomy_exists() Checks whether taxonomy exists + * @global array $wp_taxonomies The registered taxonomies. * - * @param string $taxonomy Name of taxonomy object to return - * @return object|bool The Taxonomy Object or false if $taxonomy doesn't exist + * @param string $taxonomy Name of taxonomy object to return. + * @return object|false The Taxonomy Object or false if $taxonomy doesn't exist. */ function get_taxonomy( $taxonomy ) { global $wp_taxonomies; @@ -198,13 +226,11 @@ function get_taxonomy( $taxonomy ) { * * Formerly is_taxonomy(), introduced in 2.3.0. * - * @package WordPress - * @subpackage Taxonomy * @since 3.0.0 * - * @uses $wp_taxonomies + * @global array $wp_taxonomies The registered taxonomies. * - * @param string $taxonomy Name of taxonomy object + * @param string $taxonomy Name of taxonomy object. * @return bool Whether the taxonomy exists. */ function taxonomy_exists( $taxonomy ) { @@ -221,15 +247,10 @@ function taxonomy_exists( $taxonomy ) { * * A false return value might also mean that the taxonomy does not exist. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 * - * @uses taxonomy_exists() Checks whether taxonomy exists - * @uses get_taxonomy() Used to get the taxonomy object - * - * @param string $taxonomy Name of taxonomy object - * @return bool Whether the taxonomy is hierarchical + * @param string $taxonomy Name of taxonomy object. + * @return bool Whether the taxonomy is hierarchical. */ function is_taxonomy_hierarchical($taxonomy) { if ( ! taxonomy_exists($taxonomy) ) @@ -252,98 +273,144 @@ function is_taxonomy_hierarchical($taxonomy) { * * Optional $args contents: * - * label - Name of the taxonomy shown in the menu. Usually plural. If not set, labels['name'] will be used. - * - * hierarchical - has some defined purpose at other parts of the API and is a - * boolean value. - * - * update_count_callback - works much like a hook, in that it will be called - * when the count is updated. - * - * rewrite - false to prevent rewrite, or array('slug'=>$slug) to customize - * permastruct; default will use $taxonomy as slug. - * - * query_var - false to prevent queries, or string to customize query var - * (?$query_var=$term); default will use $taxonomy as query var. + * - label - Name of the taxonomy shown in the menu. Usually plural. If not set, labels['name'] will be used. + * - labels - An array of labels for this taxonomy. + * * By default tag labels are used for non-hierarchical types and category labels for hierarchical ones. + * * You can see accepted values in {@link get_taxonomy_labels()}. + * - description - A short descriptive summary of what the taxonomy is for. Defaults to blank. + * - public - If the taxonomy should be publicly queryable; //@TODO not implemented. + * * Defaults to true. + * - hierarchical - Whether the taxonomy is hierarchical (e.g. category). Defaults to false. + * - show_ui - Whether to generate a default UI for managing this taxonomy in the admin. + * * If not set, the default is inherited from public. + * - show_in_menu - Whether to show the taxonomy in the admin menu. + * * If true, the taxonomy is shown as a submenu of the object type menu. + * * If false, no menu is shown. + * * show_ui must be true. + * * If not set, the default is inherited from show_ui. + * - show_in_nav_menus - Makes this taxonomy available for selection in navigation menus. + * * If not set, the default is inherited from public. + * - show_tagcloud - Whether to list the taxonomy in the Tag Cloud Widget. + * * If not set, the default is inherited from show_ui. + * - show_in_quick_edit - Whether to show the taxonomy in the quick/bulk edit panel. + * * It not set, the default is inherited from show_ui. + * - show_admin_column - Whether to display a column for the taxonomy on its post type listing screens. + * * Defaults to false. + * - meta_box_cb - Provide a callback function for the meta box display. + * * If not set, defaults to post_categories_meta_box for hierarchical taxonomies + * and post_tags_meta_box for non-hierarchical. + * * If false, no meta box is shown. + * - capabilities - Array of capabilities for this taxonomy. + * * You can see accepted values in this function. + * - rewrite - Triggers the handling of rewrites for this taxonomy. Defaults to true, using $taxonomy as slug. + * * To prevent rewrite, set to false. + * * To specify rewrite rules, an array can be passed with any of these keys + * * 'slug' => string Customize the permastruct slug. Defaults to $taxonomy key + * * 'with_front' => bool Should the permastruct be prepended with WP_Rewrite::$front. Defaults to true. + * * 'hierarchical' => bool Either hierarchical rewrite tag or not. Defaults to false. + * * 'ep_mask' => const Assign an endpoint mask. + * * If not specified, defaults to EP_NONE. + * - query_var - Sets the query_var key for this taxonomy. Defaults to $taxonomy key + * * If false, a taxonomy cannot be loaded at ?{query_var}={term_slug} + * * If specified as a string, the query ?{query_var_string}={term_slug} will be valid. + * - update_count_callback - Works much like a hook, in that it will be called when the count is updated. + * * Defaults to _update_post_term_count() for taxonomies attached to post types, which then confirms + * that the objects are published before counting them. + * * Defaults to _update_generic_term_count() for taxonomies attached to other object types, such as links. + * - _builtin - true if this taxonomy is a native or "built-in" taxonomy. THIS IS FOR INTERNAL USE ONLY! + * + * @todo Document $args as a hash notation. * - * public - If the taxonomy should be publically queryable; //@TODO not implemented. - * defaults to true. - * - * show_ui - If the WordPress UI admin tags UI should apply to this taxonomy; - * defaults to public. - * - * show_in_nav_menus - true makes this taxonomy available for selection in navigation menus. - * Defaults to public. - * - * show_tagcloud - false to prevent the taxonomy being listed in the Tag Cloud Widget; - * defaults to show_ui which defalts to public. - * - * labels - An array of labels for this taxonomy. You can see accepted values in {@link get_taxonomy_labels()}. By default tag labels are used for non-hierarchical types and category labels for hierarchical ones. - * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 - * @uses $wp_taxonomies Inserts new taxonomy object into the list - * @uses $wp_rewrite Adds rewrite tags and permastructs - * @uses $wp Adds query vars + * @since 4.2.0 Introduced `show_in_quick_edit` argument. + * + * @global array $wp_taxonomies Registered taxonomies. + * @global WP $wp WP instance. * - * @param string $taxonomy Name of taxonomy object + * @param string $taxonomy Taxonomy key, must not exceed 32 characters. * @param array|string $object_type Name of the object type for the taxonomy object. - * @param array|string $args See above description for the two keys values. + * @param array|string $args See optional args description above. + * @return WP_Error|void WP_Error, if errors. */ function register_taxonomy( $taxonomy, $object_type, $args = array() ) { - global $wp_taxonomies, $wp_rewrite, $wp; + global $wp_taxonomies, $wp; - if ( ! is_array($wp_taxonomies) ) + if ( ! is_array( $wp_taxonomies ) ) $wp_taxonomies = array(); - $defaults = array( 'hierarchical' => false, - 'update_count_callback' => '', - 'rewrite' => true, - 'query_var' => $taxonomy, - 'public' => true, - 'show_ui' => null, - 'show_tagcloud' => null, - '_builtin' => false, - 'labels' => array(), - 'capabilities' => array(), - 'show_in_nav_menus' => null, - ); - $args = wp_parse_args($args, $defaults); + $defaults = array( + 'labels' => array(), + 'description' => '', + 'public' => true, + 'hierarchical' => false, + 'show_ui' => null, + 'show_in_menu' => null, + 'show_in_nav_menus' => null, + 'show_tagcloud' => null, + 'show_in_quick_edit' => null, + 'show_admin_column' => false, + 'meta_box_cb' => null, + 'capabilities' => array(), + 'rewrite' => true, + 'query_var' => $taxonomy, + 'update_count_callback' => '', + '_builtin' => false, + ); + $args = wp_parse_args( $args, $defaults ); - if ( false !== $args['query_var'] && !empty($wp) ) { + if ( empty( $taxonomy ) || strlen( $taxonomy ) > 32 ) { + _doing_it_wrong( __FUNCTION__, __( 'Taxonomy names must be between 1 and 32 characters in length.' ), '4.2' ); + return new WP_Error( 'taxonomy_length_invalid', __( 'Taxonomy names must be between 1 and 32 characters in length.' ) ); + } + + if ( false !== $args['query_var'] && ! empty( $wp ) ) { if ( true === $args['query_var'] ) $args['query_var'] = $taxonomy; - $args['query_var'] = sanitize_title_with_dashes($args['query_var']); - $wp->add_query_var($args['query_var']); + else + $args['query_var'] = sanitize_title_with_dashes( $args['query_var'] ); + $wp->add_query_var( $args['query_var'] ); } - if ( false !== $args['rewrite'] && '' != get_option('permalink_structure') ) { - $args['rewrite'] = wp_parse_args($args['rewrite'], array( - 'slug' => sanitize_title_with_dashes($taxonomy), + if ( false !== $args['rewrite'] && ( is_admin() || '' != get_option( 'permalink_structure' ) ) ) { + $args['rewrite'] = wp_parse_args( $args['rewrite'], array( 'with_front' => true, - 'hierarchical' => false - )); + 'hierarchical' => false, + 'ep_mask' => EP_NONE, + ) ); + + if ( empty( $args['rewrite']['slug'] ) ) + $args['rewrite']['slug'] = sanitize_title_with_dashes( $taxonomy ); if ( $args['hierarchical'] && $args['rewrite']['hierarchical'] ) $tag = '(.+?)'; else $tag = '([^/]+)'; - $wp_rewrite->add_rewrite_tag("%$taxonomy%", $tag, $args['query_var'] ? "{$args['query_var']}=" : "taxonomy=$taxonomy&term="); - $wp_rewrite->add_permastruct($taxonomy, "{$args['rewrite']['slug']}/%$taxonomy%", $args['rewrite']['with_front']); + add_rewrite_tag( "%$taxonomy%", $tag, $args['query_var'] ? "{$args['query_var']}=" : "taxonomy=$taxonomy&term=" ); + add_permastruct( $taxonomy, "{$args['rewrite']['slug']}/%$taxonomy%", $args['rewrite'] ); } - if ( is_null($args['show_ui']) ) + // If not set, default to the setting for public. + if ( null === $args['show_ui'] ) $args['show_ui'] = $args['public']; - // Whether to show this type in nav-menus.php. Defaults to the setting for public. + // If not set, default to the setting for show_ui. + if ( null === $args['show_in_menu' ] || ! $args['show_ui'] ) + $args['show_in_menu' ] = $args['show_ui']; + + // If not set, default to the setting for public. if ( null === $args['show_in_nav_menus'] ) $args['show_in_nav_menus'] = $args['public']; - if ( is_null($args['show_tagcloud']) ) + // If not set, default to the setting for show_ui. + if ( null === $args['show_tagcloud'] ) $args['show_tagcloud'] = $args['show_ui']; + // If not set, default to the setting for show_ui. + if ( null === $args['show_in_quick_edit'] ) { + $args['show_in_quick_edit'] = $args['show_ui']; + } + $default_caps = array( 'manage_terms' => 'manage_categories', 'edit_terms' => 'manage_categories', @@ -354,62 +421,96 @@ function register_taxonomy( $taxonomy, $object_type, $args = array() ) { unset( $args['capabilities'] ); $args['name'] = $taxonomy; - $args['object_type'] = (array) $object_type; + $args['object_type'] = array_unique( (array) $object_type ); $args['labels'] = get_taxonomy_labels( (object) $args ); $args['label'] = $args['labels']->name; - $wp_taxonomies[$taxonomy] = (object) $args; + // If not set, use the default meta box + if ( null === $args['meta_box_cb'] ) { + if ( $args['hierarchical'] ) + $args['meta_box_cb'] = 'post_categories_meta_box'; + else + $args['meta_box_cb'] = 'post_tags_meta_box'; + } + + $wp_taxonomies[ $taxonomy ] = (object) $args; // register callback handling for metabox - add_filter('wp_ajax_add-' . $taxonomy, '_wp_ajax_add_hierarchical_term'); + add_filter( 'wp_ajax_add-' . $taxonomy, '_wp_ajax_add_hierarchical_term' ); + + /** + * Fires after a taxonomy is registered. + * + * @since 3.3.0 + * + * @param string $taxonomy Taxonomy slug. + * @param array|string $object_type Object type or array of object types. + * @param array $args Array of taxonomy registration arguments. + */ + do_action( 'registered_taxonomy', $taxonomy, $object_type, $args ); } /** * Builds an object with all taxonomy labels out of a taxonomy object * * Accepted keys of the label array in the taxonomy object: - * - name - general name for the taxonomy, usually plural. The same as and overriden by $tax->label. Default is Post Tags/Categories - * - singular_name - name for one object of this taxonomy. Default is Post Tag/Category + * + * - name - general name for the taxonomy, usually plural. The same as and overridden by $tax->label. Default is Tags/Categories + * - singular_name - name for one object of this taxonomy. Default is Tag/Category * - search_items - Default is Search Tags/Search Categories * - popular_items - This string isn't used on hierarchical taxonomies. Default is Popular Tags * - all_items - Default is All Tags/All Categories * - parent_item - This string isn't used on non-hierarchical taxonomies. In hierarchical ones the default is Parent Category - * - parent_item_colon - The same as parent_item, but with colon : in the end + * - parent_item_colon - The same as `parent_item`, but with colon `:` in the end * - edit_item - Default is Edit Tag/Edit Category + * - view_item - Default is View Tag/View Category * - update_item - Default is Update Tag/Update Category * - add_new_item - Default is Add New Tag/Add New Category * - new_item_name - Default is New Tag Name/New Category Name - * - separate_items_with_commas - This string isn't used on hierarchical taxonomies. Default is "Separate tags with commas," used in the meta box. - * - add_or_remove_items - This string isn't used on hierarchical taxonomies. Default is "Add or remove tags," used in the meta box when JavaScript is disabled. - * - choose_from_most_used - This string isn't used on hierarchical taxonomies. Default is "Choose from the most used tags," used in the meta box. + * - separate_items_with_commas - This string isn't used on hierarchical taxonomies. Default is "Separate tags with commas", used in the meta box. + * - add_or_remove_items - This string isn't used on hierarchical taxonomies. Default is "Add or remove tags", used in the meta box when JavaScript is disabled. + * - choose_from_most_used - This string isn't used on hierarchical taxonomies. Default is "Choose from the most used tags", used in the meta box. + * - not_found - Default is "No tags found"/"No categories found", used in the meta box and taxonomy list table. + * - no_terms - Default is "No tags"/"No categories", used in the posts and media list tables. * - * Above, the first default value is for non-hierarchical taxonomies (like tags) and the second one is for hierarchical taxonomies (like categories.) + * Above, the first default value is for non-hierarchical taxonomies (like tags) and the second one is for hierarchical taxonomies (like categories). + * + * @todo Better documentation for the labels array. * * @since 3.0.0 - * @param object $tax Taxonomy object - * @return object object with all the labels as member variables + * @since 4.3.0 Added the `no_terms` label. + * + * @param object $tax Taxonomy object. + * @return object object with all the labels as member variables. */ - function get_taxonomy_labels( $tax ) { + $tax->labels = (array) $tax->labels; + if ( isset( $tax->helps ) && empty( $tax->labels['separate_items_with_commas'] ) ) $tax->labels['separate_items_with_commas'] = $tax->helps; + if ( isset( $tax->no_tagcloud ) && empty( $tax->labels['not_found'] ) ) + $tax->labels['not_found'] = $tax->no_tagcloud; + $nohier_vs_hier_defaults = array( - 'name' => array( _x( 'Post Tags', 'taxonomy general name' ), _x( 'Categories', 'taxonomy general name' ) ), - 'singular_name' => array( _x( 'Post Tag', 'taxonomy singular name' ), _x( 'Category', 'taxonomy singular name' ) ), + 'name' => array( _x( 'Tags', 'taxonomy general name' ), _x( 'Categories', 'taxonomy general name' ) ), + 'singular_name' => array( _x( 'Tag', 'taxonomy singular name' ), _x( 'Category', 'taxonomy singular name' ) ), 'search_items' => array( __( 'Search Tags' ), __( 'Search Categories' ) ), 'popular_items' => array( __( 'Popular Tags' ), null ), 'all_items' => array( __( 'All Tags' ), __( 'All Categories' ) ), 'parent_item' => array( null, __( 'Parent Category' ) ), 'parent_item_colon' => array( null, __( 'Parent Category:' ) ), 'edit_item' => array( __( 'Edit Tag' ), __( 'Edit Category' ) ), + 'view_item' => array( __( 'View Tag' ), __( 'View Category' ) ), 'update_item' => array( __( 'Update Tag' ), __( 'Update Category' ) ), 'add_new_item' => array( __( 'Add New Tag' ), __( 'Add New Category' ) ), 'new_item_name' => array( __( 'New Tag Name' ), __( 'New Category Name' ) ), 'separate_items_with_commas' => array( __( 'Separate tags with commas' ), null ), 'add_or_remove_items' => array( __( 'Add or remove tags' ), null ), 'choose_from_most_used' => array( __( 'Choose from the most used tags' ), null ), + 'not_found' => array( __( 'No tags found.' ), __( 'No categories found.' ) ), + 'no_terms' => array( __( 'No tags' ), __( 'No categories' ) ), ); $nohier_vs_hier_defaults['menu_name'] = $nohier_vs_hier_defaults['name']; @@ -419,14 +520,13 @@ function get_taxonomy_labels( $tax ) { /** * Add an already registered taxonomy to an object type. * - * @package WordPress - * @subpackage Taxonomy * @since 3.0.0 - * @uses $wp_taxonomies Modifies taxonomy object * - * @param string $taxonomy Name of taxonomy object - * @param array|string $object_type Name of the object type - * @return bool True if successful, false if not + * @global array $wp_taxonomies The registered taxonomies. + * + * @param string $taxonomy Name of taxonomy object. + * @param string $object_type Name of the object type. + * @return bool True if successful, false if not. */ function register_taxonomy_for_object_type( $taxonomy, $object_type) { global $wp_taxonomies; @@ -437,8 +537,40 @@ function register_taxonomy_for_object_type( $taxonomy, $object_type) { if ( ! get_post_type_object($object_type) ) return false; - $wp_taxonomies[$taxonomy]->object_type[] = $object_type; + if ( ! in_array( $object_type, $wp_taxonomies[$taxonomy]->object_type ) ) + $wp_taxonomies[$taxonomy]->object_type[] = $object_type; + + // Filter out empties. + $wp_taxonomies[ $taxonomy ]->object_type = array_filter( $wp_taxonomies[ $taxonomy ]->object_type ); + + return true; +} + +/** + * Remove an already registered taxonomy from an object type. + * + * @since 3.7.0 + * + * @global array $wp_taxonomies The registered taxonomies. + * + * @param string $taxonomy Name of taxonomy object. + * @param string $object_type Name of the object type. + * @return bool True if successful, false if not. + */ +function unregister_taxonomy_for_object_type( $taxonomy, $object_type ) { + global $wp_taxonomies; + + if ( ! isset( $wp_taxonomies[ $taxonomy ] ) ) + return false; + + if ( ! get_post_type_object( $object_type ) ) + return false; + + $key = array_search( $object_type, $wp_taxonomies[ $taxonomy ]->object_type, true ); + if ( false === $key ) + return false; + unset( $wp_taxonomies[ $taxonomy ]->object_type[ $key ] ); return true; } @@ -461,38 +593,35 @@ function register_taxonomy_for_object_type( $taxonomy, $object_type) { * using PHP sort family functions or using the database by using $args with * either ASC or DESC array. The value should be in the key named 'order'. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 * - * @uses $wpdb - * @uses wp_parse_args() Creates an array from string $args. + * @global wpdb $wpdb WordPress database abstraction object. * - * @param int|array $term_ids Term id or array of term ids of terms that will be used - * @param string|array $taxonomies String of taxonomy name or Array of string values of taxonomy names - * @param array|string $args Change the order of the object_ids, either ASC or DESC - * @return WP_Error|array If the taxonomy does not exist, then WP_Error will be returned. On success + * @param int|array $term_ids Term id or array of term ids of terms that will be used. + * @param string|array $taxonomies String of taxonomy name or Array of string values of taxonomy names. + * @param array|string $args Change the order of the object_ids, either ASC or DESC. + * @return WP_Error|array If the taxonomy does not exist, then WP_Error will be returned. On success. * the array can be empty meaning that there are no $object_ids found or it will return the $object_ids found. */ function get_objects_in_term( $term_ids, $taxonomies, $args = array() ) { global $wpdb; - if ( ! is_array( $term_ids ) ) + if ( ! is_array( $term_ids ) ) { $term_ids = array( $term_ids ); - - if ( ! is_array( $taxonomies ) ) + } + if ( ! is_array( $taxonomies ) ) { $taxonomies = array( $taxonomies ); - + } foreach ( (array) $taxonomies as $taxonomy ) { - if ( ! taxonomy_exists( $taxonomy ) ) - return new WP_Error( 'invalid_taxonomy', __( 'Invalid Taxonomy' ) ); + if ( ! taxonomy_exists( $taxonomy ) ) { + return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy' ) ); + } } $defaults = array( 'order' => 'ASC' ); $args = wp_parse_args( $args, $defaults ); - extract( $args, EXTR_SKIP ); - $order = ( 'desc' == strtolower( $order ) ) ? 'DESC' : 'ASC'; + $order = ( 'desc' == strtolower( $args['order'] ) ) ? 'DESC' : 'ASC'; $term_ids = array_map('intval', $term_ids ); @@ -501,9 +630,9 @@ function get_objects_in_term( $term_ids, $taxonomies, $args = array() ) { $object_ids = $wpdb->get_col("SELECT tr.object_id FROM $wpdb->term_relationships AS tr INNER JOIN $wpdb->term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy IN ($taxonomies) AND tt.term_id IN ($term_ids) ORDER BY tr.object_id $order"); - if ( ! $object_ids ) + if ( ! $object_ids ){ return array(); - + } return $object_ids; } @@ -514,7 +643,7 @@ function get_objects_in_term( $term_ids, $taxonomies, $args = array() ) { * * @see WP_Tax_Query * - * @param array $tax_query A compact tax query + * @param array $tax_query A compact tax query * @param string $primary_table * @param string $primary_id_column * @return array @@ -525,30 +654,26 @@ function get_tax_sql( $tax_query, $primary_table, $primary_id_column ) { } /** - * Container class for a multiple taxonomy query. + * Class for generating SQL clauses that filter a primary query according to object taxonomy terms. + * + * `WP_Tax_Query` is a helper that allows primary query classes, such as WP_Query, to filter + * their results by object metadata, by generating `JOIN` and `WHERE` subclauses to be attached + * to the primary SQL query string. * * @since 3.1.0 */ class WP_Tax_Query { /** - * List of taxonomy queries. A single taxonomy query is an associative array: - * - 'taxonomy' string The taxonomy being queried - * - 'terms' string|array The list of terms - * - 'field' string (optional) Which term field is being used. - * Possible values: 'term_id', 'slug' or 'name' - * Default: 'term_id' - * - 'operator' string (optional) - * Possible values: 'IN' and 'NOT IN'. - * Default: 'IN' - * - 'include_children' bool (optional) Whether to include child terms. - * Default: true + * Array of taxonomy queries. + * + * See {@see WP_Tax_Query::__construct()} for information on tax query arguments. * * @since 3.1.0 * @access public * @var array */ - var $queries = array(); + public $queries = array(); /** * The relation between the queries. Can be one of 'AND' or 'OR'. @@ -557,206 +682,628 @@ class WP_Tax_Query { * @access public * @var string */ - var $relation; + public $relation; /** - * PHP4 type constructor. + * Standard response when the query should not return any rows. * - * Parses a compact tax query and sets defaults. + * @since 3.2.0 + * + * @static + * @access private + * @var string + */ + private static $no_results = array( 'join' => array( '' ), 'where' => array( '0 = 1' ) ); + + /** + * A flat list of table aliases used in the JOIN clauses. + * + * @since 4.1.0 + * @access protected + * @var array + */ + protected $table_aliases = array(); + + /** + * Terms and taxonomies fetched by this query. + * + * We store this data in a flat array because they are referenced in a + * number of places by WP_Query. + * + * @since 4.1.0 + * @access public + * @var array + */ + public $queried_terms = array(); + + /** + * Database table that where the metadata's objects are stored (eg $wpdb->users). + * + * @since 4.1.0 + * @access public + * @var string + */ + public $primary_table; + + /** + * Column in 'primary_table' that represents the ID of the object. + * + * @since 4.1.0 + * @access public + * @var string + */ + public $primary_id_column; + + /** + * Constructor. * * @since 3.1.0 + * @since 4.1.0 Added support for `$operator` 'NOT EXISTS' and 'EXISTS' values. * @access public * - * @param array $tax_query A compact tax query: - * array( - * 'relation' => 'OR', - * array( - * 'taxonomy' => 'tax1', - * 'terms' => array( 'term1', 'term2' ), - * 'field' => 'slug', - * ), - * array( - * 'taxonomy' => 'tax2', - * 'terms' => array( 'term-a', 'term-b' ), - * 'field' => 'slug', - * ), - * ) - * - * @return WP_Tax_Query + * @param array $tax_query { + * Array of taxonomy query clauses. + * + * @type string $relation Optional. The MySQL keyword used to join + * the clauses of the query. Accepts 'AND', or 'OR'. Default 'AND'. + * @type array { + * Optional. An array of first-order clause parameters, or another fully-formed tax query. + * + * @type string $taxonomy Taxonomy being queried. Optional when field=term_taxonomy_id. + * @type string|int|array $terms Term or terms to filter by. + * @type string $field Field to match $terms against. Accepts 'term_id', 'slug', + * 'name', or 'term_taxonomy_id'. Default: 'term_id'. + * @type string $operator MySQL operator to be used with $terms in the WHERE clause. + * Accepts 'AND', 'IN', 'NOT IN', 'EXISTS', 'NOT EXISTS'. + * Default: 'IN'. + * @type bool $include_children Optional. Whether to include child terms. + * Requires a $taxonomy. Default: true. + * } + * } */ - function WP_Tax_Query( $tax_query ) { - if ( isset( $tax_query['relation'] ) && strtoupper( $tax_query['relation'] ) == 'OR' ) { - $this->relation = 'OR'; + public function __construct( $tax_query ) { + if ( isset( $tax_query['relation'] ) ) { + $this->relation = $this->sanitize_relation( $tax_query['relation'] ); } else { $this->relation = 'AND'; } + $this->queries = $this->sanitize_query( $tax_query ); + } + + /** + * Ensure the 'tax_query' argument passed to the class constructor is well-formed. + * + * Ensures that each query-level clause has a 'relation' key, and that + * each first-order clause contains all the necessary keys from `$defaults`. + * + * @since 4.1.0 + * @access public + * + * @param array $queries Array of queries clauses. + * @return array Sanitized array of query clauses. + */ + public function sanitize_query( $queries ) { + $cleaned_query = array(); + $defaults = array( 'taxonomy' => '', 'terms' => array(), - 'include_children' => true, 'field' => 'term_id', 'operator' => 'IN', + 'include_children' => true, ); - foreach ( $tax_query as $query ) { - if ( ! is_array( $query ) ) - continue; + foreach ( $queries as $key => $query ) { + if ( 'relation' === $key ) { + $cleaned_query['relation'] = $this->sanitize_relation( $query ); + + // First-order clause. + } elseif ( self::is_first_order_clause( $query ) ) { + + $cleaned_clause = array_merge( $defaults, $query ); + $cleaned_clause['terms'] = (array) $cleaned_clause['terms']; + $cleaned_query[] = $cleaned_clause; + + /* + * Keep a copy of the clause in the flate + * $queried_terms array, for use in WP_Query. + */ + if ( ! empty( $cleaned_clause['taxonomy'] ) && 'NOT IN' !== $cleaned_clause['operator'] ) { + $taxonomy = $cleaned_clause['taxonomy']; + if ( ! isset( $this->queried_terms[ $taxonomy ] ) ) { + $this->queried_terms[ $taxonomy ] = array(); + } + + /* + * Backward compatibility: Only store the first + * 'terms' and 'field' found for a given taxonomy. + */ + if ( ! empty( $cleaned_clause['terms'] ) && ! isset( $this->queried_terms[ $taxonomy ]['terms'] ) ) { + $this->queried_terms[ $taxonomy ]['terms'] = $cleaned_clause['terms']; + } + + if ( ! empty( $cleaned_clause['field'] ) && ! isset( $this->queried_terms[ $taxonomy ]['field'] ) ) { + $this->queried_terms[ $taxonomy ]['field'] = $cleaned_clause['field']; + } + } + + // Otherwise, it's a nested query, so we recurse. + } elseif ( is_array( $query ) ) { + $cleaned_subquery = $this->sanitize_query( $query ); - $query = array_merge( $defaults, $query ); + if ( ! empty( $cleaned_subquery ) ) { + // All queries with children must have a relation. + if ( ! isset( $cleaned_subquery['relation'] ) ) { + $cleaned_subquery['relation'] = 'AND'; + } + + $cleaned_query[] = $cleaned_subquery; + } + } + } - $query['terms'] = (array) $query['terms']; + return $cleaned_query; + } - $this->queries[] = $query; + /** + * Sanitize a 'relation' operator. + * + * @since 4.1.0 + * @access public + * + * @param string $relation Raw relation key from the query argument. + * @return string Sanitized relation ('AND' or 'OR'). + */ + public function sanitize_relation( $relation ) { + if ( 'OR' === strtoupper( $relation ) ) { + return 'OR'; + } else { + return 'AND'; } } + /** + * Determine whether a clause is first-order. + * + * A "first-order" clause is one that contains any of the first-order + * clause keys ('terms', 'taxonomy', 'include_children', 'field', + * 'operator'). An empty clause also counts as a first-order clause, + * for backward compatibility. Any clause that doesn't meet this is + * determined, by process of elimination, to be a higher-order query. + * + * @since 4.1.0 + * + * @static + * @access protected + * + * @param array $query Tax query arguments. + * @return bool Whether the query clause is a first-order clause. + */ + protected static function is_first_order_clause( $query ) { + return is_array( $query ) && ( empty( $query ) || array_key_exists( 'terms', $query ) || array_key_exists( 'taxonomy', $query ) || array_key_exists( 'include_children', $query ) || array_key_exists( 'field', $query ) || array_key_exists( 'operator', $query ) ); + } + /** * Generates SQL clauses to be appended to a main query. * * @since 3.1.0 + * + * @static * @access public * - * @param string $primary_table - * @param string $primary_id_column - * @return array + * @param string $primary_table Database table where the object being filtered is stored (eg wp_users). + * @param string $primary_id_column ID column for the filtered object in $primary_table. + * @return array { + * Array containing JOIN and WHERE SQL clauses to append to the main query. + * + * @type string $join SQL fragment to append to the main JOIN clause. + * @type string $where SQL fragment to append to the main WHERE clause. + * } */ - function get_sql( $primary_table, $primary_id_column ) { - global $wpdb; + public function get_sql( $primary_table, $primary_id_column ) { + $this->primary_table = $primary_table; + $this->primary_id_column = $primary_id_column; - $join = ''; - $where = array(); - $i = 0; + return $this->get_sql_clauses(); + } - foreach ( $this->queries as $query ) { - extract( $query ); + /** + * Generate SQL clauses to be appended to a main query. + * + * Called by the public WP_Tax_Query::get_sql(), this method + * is abstracted out to maintain parity with the other Query classes. + * + * @since 4.1.0 + * @access protected + * + * @return array { + * Array containing JOIN and WHERE SQL clauses to append to the main query. + * + * @type string $join SQL fragment to append to the main JOIN clause. + * @type string $where SQL fragment to append to the main WHERE clause. + * } + */ + protected function get_sql_clauses() { + /* + * $queries are passed by reference to get_sql_for_query() for recursion. + * To keep $this->queries unaltered, pass a copy. + */ + $queries = $this->queries; + $sql = $this->get_sql_for_query( $queries ); + + if ( ! empty( $sql['where'] ) ) { + $sql['where'] = ' AND ' . $sql['where']; + } - if ( ! taxonomy_exists( $taxonomy ) ) - return array( 'join' => '', 'where' => ' AND 0 = 1'); + return $sql; + } - $terms = array_unique( (array) $terms ); + /** + * Generate SQL clauses for a single query array. + * + * If nested subqueries are found, this method recurses the tree to + * produce the properly nested SQL. + * + * @since 4.1.0 + * @access protected + * + * @param array $query Query to parse, passed by reference. + * @param int $depth Optional. Number of tree levels deep we currently are. + * Used to calculate indentation. Default 0. + * @return array { + * Array containing JOIN and WHERE SQL clauses to append to a single query array. + * + * @type string $join SQL fragment to append to the main JOIN clause. + * @type string $where SQL fragment to append to the main WHERE clause. + * } + */ + protected function get_sql_for_query( &$query, $depth = 0 ) { + $sql_chunks = array( + 'join' => array(), + 'where' => array(), + ); - if ( empty( $terms ) ) - continue; + $sql = array( + 'join' => '', + 'where' => '', + ); - if ( is_taxonomy_hierarchical( $taxonomy ) && $include_children ) { - $this->_transform_terms( $terms, $taxonomy, $field, 'term_id' ); + $indent = ''; + for ( $i = 0; $i < $depth; $i++ ) { + $indent .= " "; + } - $children = array(); - foreach ( $terms as $term ) { - $children = array_merge( $children, get_term_children( $term, $taxonomy ) ); - $children[] = $term; + foreach ( $query as $key => &$clause ) { + if ( 'relation' === $key ) { + $relation = $query['relation']; + } elseif ( is_array( $clause ) ) { + + // This is a first-order clause. + if ( $this->is_first_order_clause( $clause ) ) { + $clause_sql = $this->get_sql_for_clause( $clause, $query ); + + $where_count = count( $clause_sql['where'] ); + if ( ! $where_count ) { + $sql_chunks['where'][] = ''; + } elseif ( 1 === $where_count ) { + $sql_chunks['where'][] = $clause_sql['where'][0]; + } else { + $sql_chunks['where'][] = '( ' . implode( ' AND ', $clause_sql['where'] ) . ' )'; + } + + $sql_chunks['join'] = array_merge( $sql_chunks['join'], $clause_sql['join'] ); + // This is a subquery, so we recurse. + } else { + $clause_sql = $this->get_sql_for_query( $clause, $depth + 1 ); + + $sql_chunks['where'][] = $clause_sql['where']; + $sql_chunks['join'][] = $clause_sql['join']; } - $terms = $children; - - $this->_transform_terms( $terms, $taxonomy, 'term_id', 'term_taxonomy_id' ); - } - else { - $this->_transform_terms( $terms, $taxonomy, $field, 'term_taxonomy_id' ); } + } - if ( 'IN' == $operator ) { + // Filter to remove empties. + $sql_chunks['join'] = array_filter( $sql_chunks['join'] ); + $sql_chunks['where'] = array_filter( $sql_chunks['where'] ); - if ( empty( $terms ) ) { - if ( 'OR' == $this->relation ) - continue; - else - return array( 'join' => '', 'where' => ' AND 0 = 1' ); - } + if ( empty( $relation ) ) { + $relation = 'AND'; + } + + // Filter duplicate JOIN clauses and combine into a single string. + if ( ! empty( $sql_chunks['join'] ) ) { + $sql['join'] = implode( ' ', array_unique( $sql_chunks['join'] ) ); + } + + // Generate a single WHERE clause with proper brackets and indentation. + if ( ! empty( $sql_chunks['where'] ) ) { + $sql['where'] = '( ' . "\n " . $indent . implode( ' ' . "\n " . $indent . $relation . ' ' . "\n " . $indent, $sql_chunks['where'] ) . "\n" . $indent . ')'; + } - $terms = implode( ',', $terms ); + return $sql; + } + + /** + * Generate SQL JOIN and WHERE clauses for a "first-order" query clause. + * + * @since 4.1.0 + * @access public + * + * @global wpdb $wpdb The WordPress database abstraction object. + * + * @param array $clause Query clause, passed by reference. + * @param array $parent_query Parent query array. + * @return array { + * Array containing JOIN and WHERE SQL clauses to append to a first-order query. + * + * @type string $join SQL fragment to append to the main JOIN clause. + * @type string $where SQL fragment to append to the main WHERE clause. + * } + */ + public function get_sql_for_clause( &$clause, $parent_query ) { + global $wpdb; + + $sql = array( + 'where' => array(), + 'join' => array(), + ); + + $join = $where = ''; + + $this->clean_query( $clause ); + + if ( is_wp_error( $clause ) ) { + return self::$no_results; + } + $terms = $clause['terms']; + $operator = strtoupper( $clause['operator'] ); + + if ( 'IN' == $operator ) { + + if ( empty( $terms ) ) { + return self::$no_results; + } + + $terms = implode( ',', $terms ); + + /* + * Before creating another table join, see if this clause has a + * sibling with an existing join that can be shared. + */ + $alias = $this->find_compatible_table_alias( $clause, $parent_query ); + if ( false === $alias ) { + $i = count( $this->table_aliases ); $alias = $i ? 'tt' . $i : $wpdb->term_relationships; + // Store the alias as part of a flat array to build future iterators. + $this->table_aliases[] = $alias; + + // Store the alias with this clause, so later siblings can use it. + $clause['alias'] = $alias; + $join .= " INNER JOIN $wpdb->term_relationships"; $join .= $i ? " AS $alias" : ''; - $join .= " ON ($primary_table.$primary_id_column = $alias.object_id)"; + $join .= " ON ($this->primary_table.$this->primary_id_column = $alias.object_id)"; + } - $where[] = "$alias.term_taxonomy_id $operator ($terms)"; - } elseif ( 'NOT IN' == $operator ) { - if ( empty( $terms ) ) - continue; + $where = "$alias.term_taxonomy_id $operator ($terms)"; - $terms = implode( ',', $terms ); + } elseif ( 'NOT IN' == $operator ) { - $where[] = "$primary_table.$primary_id_column NOT IN ( - SELECT object_id - FROM $wpdb->term_relationships - WHERE term_taxonomy_id IN ($terms) - )"; - } elseif ( 'AND' == $operator ) { + if ( empty( $terms ) ) { + return $sql; + } - if ( empty( $terms ) ) - continue; + $terms = implode( ',', $terms ); - $num_terms = count( $terms ); + $where = "$this->primary_table.$this->primary_id_column NOT IN ( + SELECT object_id + FROM $wpdb->term_relationships + WHERE term_taxonomy_id IN ($terms) + )"; - $terms = implode( ',', $terms ); + } elseif ( 'AND' == $operator ) { - $where[] = "$primary_table.$primary_id_column IN ( - SELECT object_id - FROM $wpdb->term_relationships - WHERE term_taxonomy_id IN ($terms) - GROUP BY object_id HAVING COUNT(object_id) = $num_terms - )"; + if ( empty( $terms ) ) { + return $sql; } - $i++; + $num_terms = count( $terms ); + + $terms = implode( ',', $terms ); + + $where = "( + SELECT COUNT(1) + FROM $wpdb->term_relationships + WHERE term_taxonomy_id IN ($terms) + AND object_id = $this->primary_table.$this->primary_id_column + ) = $num_terms"; + + } elseif ( 'NOT EXISTS' === $operator || 'EXISTS' === $operator ) { + + $where = $wpdb->prepare( "$operator ( + SELECT 1 + FROM $wpdb->term_relationships + INNER JOIN $wpdb->term_taxonomy + ON $wpdb->term_taxonomy.term_taxonomy_id = $wpdb->term_relationships.term_taxonomy_id + WHERE $wpdb->term_taxonomy.taxonomy = %s + AND $wpdb->term_relationships.object_id = $this->primary_table.$this->primary_id_column + )", $clause['taxonomy'] ); + } - if ( !empty( $where ) ) - $where = ' AND ( ' . implode( " $this->relation ", $where ) . ' )'; - else - $where = ''; + $sql['join'][] = $join; + $sql['where'][] = $where; + return $sql; + } + + /** + * Identify an existing table alias that is compatible with the current query clause. + * + * We avoid unnecessary table joins by allowing each clause to look for + * an existing table alias that is compatible with the query that it + * needs to perform. + * + * An existing alias is compatible if (a) it is a sibling of `$clause` + * (ie, it's under the scope of the same relation), and (b) the combination + * of operator and relation between the clauses allows for a shared table + * join. In the case of WP_Tax_Query, this only applies to 'IN' + * clauses that are connected by the relation 'OR'. + * + * @since 4.1.0 + * @access protected + * + * @param array $clause Query clause. + * @param array $parent_query Parent query of $clause. + * @return string|false Table alias if found, otherwise false. + */ + protected function find_compatible_table_alias( $clause, $parent_query ) { + $alias = false; + + // Sanity check. Only IN queries use the JOIN syntax . + if ( ! isset( $clause['operator'] ) || 'IN' !== $clause['operator'] ) { + return $alias; + } + + // Since we're only checking IN queries, we're only concerned with OR relations. + if ( ! isset( $parent_query['relation'] ) || 'OR' !== $parent_query['relation'] ) { + return $alias; + } + + $compatible_operators = array( 'IN' ); + + foreach ( $parent_query as $sibling ) { + if ( ! is_array( $sibling ) || ! $this->is_first_order_clause( $sibling ) ) { + continue; + } + + if ( empty( $sibling['alias'] ) || empty( $sibling['operator'] ) ) { + continue; + } + + // The sibling must both have compatible operator to share its alias. + if ( in_array( strtoupper( $sibling['operator'] ), $compatible_operators ) ) { + $alias = $sibling['alias']; + break; + } + } - return compact( 'join', 'where' ); + return $alias; } /** - * Transforms a list of terms, from one field to another. + * Validates a single query. * - * @since 3.1.0 + * @since 3.2.0 * @access private * - * @param array &$terms The list of terms - * @param string $taxonomy The taxonomy of the terms - * @param string $field The initial field - * @param string $resulting_field The resulting field + * @param array &$query The single query. */ - function _transform_terms( &$terms, $taxonomy, $field, $resulting_field ) { - global $wpdb; + private function clean_query( &$query ) { + if ( empty( $query['taxonomy'] ) ) { + if ( 'term_taxonomy_id' !== $query['field'] ) { + $query = new WP_Error( 'Invalid taxonomy' ); + return; + } - if ( empty( $terms ) ) + // so long as there are shared terms, include_children requires that a taxonomy is set + $query['include_children'] = false; + } elseif ( ! taxonomy_exists( $query['taxonomy'] ) ) { + $query = new WP_Error( 'Invalid taxonomy' ); return; + } - if ( $field == $resulting_field ) - return; + $query['terms'] = array_unique( (array) $query['terms'] ); - $resulting_field = esc_sql( $resulting_field ); + if ( is_taxonomy_hierarchical( $query['taxonomy'] ) && $query['include_children'] ) { + $this->transform_query( $query, 'term_id' ); - switch ( $field ) { - case 'slug': - case 'name': - $terms = "'" . implode( "','", array_map( 'sanitize_title_for_query', $terms ) ) . "'"; - $terms = $wpdb->get_col( " + if ( is_wp_error( $query ) ) + return; + + $children = array(); + foreach ( $query['terms'] as $term ) { + $children = array_merge( $children, get_term_children( $term, $query['taxonomy'] ) ); + $children[] = $term; + } + $query['terms'] = $children; + } + + $this->transform_query( $query, 'term_taxonomy_id' ); + } + + /** + * Transforms a single query, from one field to another. + * + * @since 3.2.0 + * + * @global wpdb $wpdb The WordPress database abstraction object. + * + * @param array &$query The single query. + * @param string $resulting_field The resulting field. Accepts 'slug', 'name', 'term_taxonomy_id', + * or 'term_id'. Default 'term_id'. + */ + public function transform_query( &$query, $resulting_field ) { + global $wpdb; + + if ( empty( $query['terms'] ) ) + return; + + if ( $query['field'] == $resulting_field ) + return; + + $resulting_field = sanitize_key( $resulting_field ); + + switch ( $query['field'] ) { + case 'slug': + case 'name': + foreach ( $query['terms'] as &$term ) { + /* + * 0 is the $term_id parameter. We don't have a term ID yet, but it doesn't + * matter because `sanitize_term_field()` ignores the $term_id param when the + * context is 'db'. + */ + $term = "'" . esc_sql( sanitize_term_field( $query['field'], $term, 0, $query['taxonomy'], 'db' ) ) . "'"; + } + + $terms = implode( ",", $query['terms'] ); + + $terms = $wpdb->get_col( " SELECT $wpdb->term_taxonomy.$resulting_field FROM $wpdb->term_taxonomy INNER JOIN $wpdb->terms USING (term_id) - WHERE taxonomy = '$taxonomy' - AND $wpdb->terms.$field IN ($terms) + WHERE taxonomy = '{$query['taxonomy']}' + AND $wpdb->terms.{$query['field']} IN ($terms) + " ); + break; + case 'term_taxonomy_id': + $terms = implode( ',', array_map( 'intval', $query['terms'] ) ); + $terms = $wpdb->get_col( " + SELECT $resulting_field + FROM $wpdb->term_taxonomy + WHERE term_taxonomy_id IN ($terms) " ); break; - default: - $terms = implode( ',', array_map( 'intval', $terms ) ); + $terms = implode( ',', array_map( 'intval', $query['terms'] ) ); $terms = $wpdb->get_col( " SELECT $resulting_field FROM $wpdb->term_taxonomy - WHERE taxonomy = '$taxonomy' + WHERE taxonomy = '{$query['taxonomy']}' AND term_id IN ($terms) " ); } + + if ( 'AND' == $query['operator'] && count( $terms ) < count( $query['terms'] ) ) { + $query = new WP_Error( 'Inexistent terms' ); + return; + } + + $query['terms'] = $terms; + $query['field'] = $resulting_field; } } @@ -776,61 +1323,78 @@ class WP_Tax_Query { * term object, and the taxonomy name as parameters. Both hooks are expected to * return a Term object. * - * 'get_term' hook - Takes two parameters the term Object and the taxonomy name. + * {@see 'get_term'} hook - Takes two parameters the term Object and the taxonomy name. * Must return term object. Used in get_term() as a catch-all filter for every * $term. * - * 'get_$taxonomy' hook - Takes two parameters the term Object and the taxonomy + * {@see 'get_$taxonomy'} hook - Takes two parameters the term Object and the taxonomy * name. Must return term object. $taxonomy will be the taxonomy name, so for * example, if 'category', it would be 'get_category' as the filter name. Useful * for custom taxonomies or plugging into default taxonomies. * - * @package WordPress - * @subpackage Taxonomy + * @todo Better formatting for DocBlock + * * @since 2.3.0 * - * @uses $wpdb - * @uses sanitize_term() Cleanses the term based on $filter context before returning. + * @global wpdb $wpdb WordPress database abstraction object. * @see sanitize_term_field() The $context param lists the available values for get_term_by() $filter param. * - * @param int|object $term If integer, will get from database. If object will apply filters and return $term. - * @param string $taxonomy Taxonomy name that $term is part of. - * @param string $output Constant OBJECT, ARRAY_A, or ARRAY_N - * @param string $filter Optional, default is raw or no WordPress defined filter will applied. - * @return mixed|null|WP_Error Term Row from database. Will return null if $term is empty. If taxonomy does not + * @param int|object $term If integer, will get from database. If object will apply filters and return $term. + * @param string $taxonomy Taxonomy name that $term is part of. + * @param string $output Constant OBJECT, ARRAY_A, or ARRAY_N + * @param string $filter Optional, default is raw or no WordPress defined filter will applied. + * @return object|array|null|WP_Error Term Row from database. Will return null if $term is empty. If taxonomy does not * exist then WP_Error will be returned. */ -function &get_term($term, $taxonomy, $output = OBJECT, $filter = 'raw') { +function get_term($term, $taxonomy, $output = OBJECT, $filter = 'raw') { global $wpdb; - $null = null; - if ( empty($term) ) { - $error = new WP_Error('invalid_term', __('Empty Term')); - return $error; + if ( empty( $term ) ) { + return new WP_Error( 'invalid_term', __( 'Empty Term' ) ); } - if ( ! taxonomy_exists($taxonomy) ) { - $error = new WP_Error('invalid_taxonomy', __('Invalid Taxonomy')); - return $error; + if ( ! taxonomy_exists( $taxonomy ) ) { + return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy' ) ); } if ( is_object($term) && empty($term->filter) ) { - wp_cache_add($term->term_id, $term, $taxonomy); + wp_cache_add( $term->term_id, $term, $taxonomy ); $_term = $term; } else { if ( is_object($term) ) $term = $term->term_id; - $term = (int) $term; - if ( ! $_term = wp_cache_get($term, $taxonomy) ) { - $_term = $wpdb->get_row( $wpdb->prepare( "SELECT t.*, tt.* FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy = %s AND t.term_id = %s LIMIT 1", $taxonomy, $term) ); + if ( !$term = (int) $term ) + return null; + if ( ! $_term = wp_cache_get( $term, $taxonomy ) ) { + $_term = $wpdb->get_row( $wpdb->prepare( "SELECT t.*, tt.* FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy = %s AND t.term_id = %d LIMIT 1", $taxonomy, $term) ); if ( ! $_term ) - return $null; - wp_cache_add($term, $_term, $taxonomy); + return null; + wp_cache_add( $term, $_term, $taxonomy ); } } - $_term = apply_filters('get_term', $_term, $taxonomy); - $_term = apply_filters("get_$taxonomy", $_term, $taxonomy); + /** + * Filter a term. + * + * @since 2.3.0 + * + * @param int|object $_term Term object or ID. + * @param string $taxonomy The taxonomy slug. + */ + $_term = apply_filters( 'get_term', $_term, $taxonomy ); + + /** + * Filter a taxonomy. + * + * The dynamic portion of the filter name, `$taxonomy`, refers + * to the taxonomy slug. + * + * @since 2.3.0 + * + * @param int|object $_term Term object or ID. + * @param string $taxonomy The taxonomy slug. + */ + $_term = apply_filters( "get_$taxonomy", $_term, $taxonomy ); $_term = sanitize_term($_term, $taxonomy, $filter); if ( $output == OBJECT ) { @@ -858,20 +1422,20 @@ function &get_term($term, $taxonomy, $output = OBJECT, $filter = 'raw') { * If $value does not exist, the return value will be false. If $taxonomy exists * and $field and $value combinations exist, the Term will be returned. * - * @package WordPress - * @subpackage Taxonomy + * @todo Better formatting for DocBlock. + * * @since 2.3.0 * - * @uses $wpdb - * @uses sanitize_term() Cleanses the term based on $filter context before returning. + * @global wpdb $wpdb WordPress database abstraction object. * @see sanitize_term_field() The $context param lists the available values for get_term_by() $filter param. * - * @param string $field Either 'slug', 'name', or 'id' - * @param string|int $value Search for this term value - * @param string $taxonomy Taxonomy Name - * @param string $output Constant OBJECT, ARRAY_A, or ARRAY_N - * @param string $filter Optional, default is raw or no WordPress defined filter will applied. - * @return mixed Term Row from database. Will return false if $taxonomy does not exist or $term was not found. + * @param string $field Either 'slug', 'name', 'id' (term_id), or 'term_taxonomy_id' + * @param string|int $value Search for this term value + * @param string $taxonomy Taxonomy Name + * @param string $output Constant OBJECT, ARRAY_A, or ARRAY_N + * @param string $filter Optional, default is raw or no WordPress defined filter will applied. + * @return object|array|null|WP_Error|false Term Row from database. + * Will return false if $taxonomy does not exist or $term was not found. */ function get_term_by($field, $value, $taxonomy, $output = OBJECT, $filter = 'raw') { global $wpdb; @@ -884,25 +1448,32 @@ function get_term_by($field, $value, $taxonomy, $output = OBJECT, $filter = 'raw $value = sanitize_title($value); if ( empty($value) ) return false; - } else if ( 'name' == $field ) { + } elseif ( 'name' == $field ) { // Assume already escaped - $value = stripslashes($value); + $value = wp_unslash($value); $field = 't.name'; + } elseif ( 'term_taxonomy_id' == $field ) { + $value = (int) $value; + $field = 'tt.term_taxonomy_id'; } else { - $term = get_term( (int) $value, $taxonomy, $output, $filter); + $term = get_term( (int) $value, $taxonomy, $output, $filter ); if ( is_wp_error( $term ) ) $term = false; return $term; } - $term = $wpdb->get_row( $wpdb->prepare( "SELECT t.*, tt.* FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy = %s AND $field = %s LIMIT 1", $taxonomy, $value) ); - if ( !$term ) + $term = $wpdb->get_row( $wpdb->prepare( "SELECT t.*, tt.* FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy = %s AND $field = %s LIMIT 1", $taxonomy, $value ) ); + if ( ! $term ) return false; - wp_cache_add($term->term_id, $term, $taxonomy); + wp_cache_add( $term->term_id, $term, $taxonomy ); + + /** This filter is documented in wp-includes/taxonomy.php */ + $term = apply_filters( 'get_term', $term, $taxonomy ); + + /** This filter is documented in wp-includes/taxonomy.php */ + $term = apply_filters( "get_$taxonomy", $term, $taxonomy ); - $term = apply_filters('get_term', $term, $taxonomy); - $term = apply_filters("get_$taxonomy", $term, $taxonomy); $term = sanitize_term($term, $taxonomy, $filter); if ( $output == OBJECT ) { @@ -924,21 +1495,15 @@ function get_term_by($field, $value, $taxonomy, $output = OBJECT, $filter = 'raw * * Will return an empty array if $term does not exist in $taxonomy. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 * - * @uses $wpdb - * @uses _get_term_hierarchy() - * @uses get_term_children() Used to get the children of both $taxonomy and the parent $term - * - * @param string $term_id ID of Term to get children - * @param string $taxonomy Taxonomy Name - * @return array|WP_Error List of Term Objects. WP_Error returned if $taxonomy does not exist + * @param string $term_id ID of Term to get children. + * @param string $taxonomy Taxonomy Name. + * @return array|WP_Error List of Term IDs. WP_Error returned if `$taxonomy` does not exist. */ function get_term_children( $term_id, $taxonomy ) { if ( ! taxonomy_exists($taxonomy) ) - return new WP_Error('invalid_taxonomy', __('Invalid Taxonomy')); + return new WP_Error('invalid_taxonomy', __('Invalid taxonomy')); $term_id = intval( $term_id ); @@ -950,6 +1515,10 @@ function get_term_children( $term_id, $taxonomy ) { $children = $terms[$term_id]; foreach ( (array) $terms[$term_id] as $child ) { + if ( $term_id == $child ) { + continue; + } + if ( isset($terms[$child]) ) $children = array_merge($children, get_term_children($child, $taxonomy)); } @@ -964,17 +1533,13 @@ function get_term_children( $term_id, $taxonomy ) { * reasons and for simplicity of usage. See sanitize_term_field() for more * information. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 * - * @uses sanitize_term_field() Passes the return value in sanitize_term_field on success. - * - * @param string $field Term field to fetch - * @param int $term Term ID - * @param string $taxonomy Taxonomy Name - * @param string $context Optional, default is display. Look at sanitize_term_field() for available options. - * @return mixed Will return an empty string if $term is not an object or if $field is not set in $term. + * @param string $field Term field to fetch. + * @param int $term Term ID. + * @param string $taxonomy Taxonomy Name. + * @param string $context Optional, default is display. Look at sanitize_term_field() for available options. + * @return string|int|null|WP_Error Will return an empty string if $term is not an object or if $field is not set in $term. */ function get_term_field( $field, $term, $taxonomy, $context = 'display' ) { $term = (int) $term; @@ -997,15 +1562,11 @@ function get_term_field( $field, $term, $taxonomy, $context = 'display' ) { * Return value is sanitize_term() and usage is for sanitizing the term for * editing. Function is for contextual and simplicity. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 * - * @uses sanitize_term() Passes the return value on success - * - * @param int|object $id Term ID or Object - * @param string $taxonomy Taxonomy Name - * @return mixed|null|WP_Error Will return empty string if $term is not an object. + * @param int|object $id Term ID or object. + * @param string $taxonomy Taxonomy name. + * @return string|int|null|WP_Error Will return empty string if $term is not an object. */ function get_term_to_edit( $id, $taxonomy ) { $term = get_term( $id, $taxonomy ); @@ -1025,239 +1586,320 @@ function get_term_to_edit( $id, $taxonomy ) { * You can fully inject any customizations to the query before it is sent, as * well as control the output with a filter. * - * The 'get_terms' filter will be called when the cache has the term and will + * The {@see 'get_terms'} filter will be called when the cache has the term and will * pass the found term along with the array of $taxonomies and array of $args. * This filter is also called before the array of terms is passed and will pass * the array of terms, along with the $taxonomies and $args. * - * The 'list_terms_exclusions' filter passes the compiled exclusions along with + * The {@see 'list_terms_exclusions'} filter passes the compiled exclusions along with * the $args. * - * The 'get_terms_orderby' filter passes the ORDER BY clause for the query + * The {@see 'get_terms_orderby'} filter passes the `ORDER BY` clause for the query * along with the $args array. * - * The 'get_terms_fields' filter passes the fields for the SELECT query - * along with the $args array. - * - * The list of arguments that $args can contain, which will overwrite the defaults: - * - * orderby - Default is 'name'. Can be name, count, term_group, slug or nothing - * (will use term_id), Passing a custom value other than these will cause it to - * order based on the custom value. - * - * order - Default is ASC. Can use DESC. - * - * hide_empty - Default is true. Will not return empty terms, which means - * terms whose count is 0 according to the given taxonomy. - * - * exclude - Default is an empty array. An array, comma- or space-delimited string - * of term ids to exclude from the return array. If 'include' is non-empty, - * 'exclude' is ignored. - * - * exclude_tree - Default is an empty array. An array, comma- or space-delimited - * string of term ids to exclude from the return array, along with all of their - * descendant terms according to the primary taxonomy. If 'include' is non-empty, - * 'exclude_tree' is ignored. - * - * include - Default is an empty array. An array, comma- or space-delimited string - * of term ids to include in the return array. - * - * number - The maximum number of terms to return. Default is to return them all. - * - * offset - The number by which to offset the terms query. - * - * fields - Default is 'all', which returns an array of term objects. - * If 'fields' is 'ids' or 'names', returns an array of - * integers or strings, respectively. - * - * slug - Returns terms whose "slug" matches this value. Default is empty string. - * - * hierarchical - Whether to include terms that have non-empty descendants - * (even if 'hide_empty' is set to true). - * - * search - Returned terms' names will contain the value of 'search', - * case-insensitive. Default is an empty string. - * - * name__like - Returned terms' names will begin with the value of 'name__like', - * case-insensitive. Default is empty string. - * - * The argument 'pad_counts', if set to true will include the quantity of a term's - * children in the quantity of each term's "count" object variable. - * - * The 'get' argument, if set to 'all' instead of its default empty string, - * returns terms regardless of ancestry or whether the terms are empty. - * - * The 'child_of' argument, when used, should be set to the integer of a term ID. Its default - * is 0. If set to a non-zero value, all returned terms will be descendants - * of that term according to the given taxonomy. Hence 'child_of' is set to 0 - * if more than one taxonomy is passed in $taxonomies, because multiple taxonomies - * make term ancestry ambiguous. - * - * The 'parent' argument, when used, should be set to the integer of a term ID. Its default is - * the empty string '', which has a different meaning from the integer 0. - * If set to an integer value, all returned terms will have as an immediate - * ancestor the term whose ID is specified by that integer according to the given taxonomy. - * The 'parent' argument is different from 'child_of' in that a term X is considered a 'parent' - * of term Y only if term X is the father of term Y, not its grandfather or great-grandfather, etc. - * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 - * - * @uses $wpdb - * @uses wp_parse_args() Merges the defaults with those defined by $args and allows for strings. - * - * @param string|array $taxonomies Taxonomy name or list of Taxonomy names - * @param string|array $args The values of what to search for when returning terms - * @return array|WP_Error List of Term Objects and their children. Will return WP_Error, if any of $taxonomies do not exist. + * @since 4.2.0 Introduced 'name' and 'childless' parameters. + * + * @global wpdb $wpdb WordPress database abstraction object. + * @global array $wp_filter + * + * @param string|array $taxonomies Taxonomy name or list of Taxonomy names. + * @param array|string $args { + * Optional. Array or string of arguments to get terms. + * + * @type string $orderby Field(s) to order terms by. Accepts term fields ('name', 'slug', + * 'term_group', 'term_id', 'id', 'description'), 'count' for term + * taxonomy count, 'include' to match the 'order' of the $include param, + * or 'none' to skip ORDER BY. Defaults to 'name'. + * @type string $order Whether to order terms in ascending or descending order. + * Accepts 'ASC' (ascending) or 'DESC' (descending). + * Default 'ASC'. + * @type bool|int $hide_empty Whether to hide terms not assigned to any posts. Accepts + * 1|true or 0|false. Default 1|true. + * @type array|string $include Array or comma/space-separated string of term ids to include. + * Default empty array. + * @type array|string $exclude Array or comma/space-separated string of term ids to exclude. + * If $include is non-empty, $exclude is ignored. + * Default empty array. + * @type array|string $exclude_tree Array or comma/space-separated string of term ids to exclude + * along with all of their descendant terms. If $include is + * non-empty, $exclude_tree is ignored. Default empty array. + * @type int|string $number Maximum number of terms to return. Accepts ''|0 (all) or any + * positive number. Default ''|0 (all). + * @type int $offset The number by which to offset the terms query. Default empty. + * @type string $fields Term fields to query for. Accepts 'all' (returns an array of + * term objects), 'ids' or 'names' (returns an array of integers + * or strings, respectively. Default 'all'. + * @type string|array $name Optional. Name or array of names to return term(s) for. Default empty. + * @type string|array $slug Optional. Slug or array of slugs to return term(s) for. Default empty. + * @type bool $hierarchical Whether to include terms that have non-empty descendants (even + * if $hide_empty is set to true). Default true. + * @type string $search Search criteria to match terms. Will be SQL-formatted with + * wildcards before and after. Default empty. + * @type string $name__like Retrieve terms with criteria by which a term is LIKE $name__like. + * Default empty. + * @type string $description__like Retrieve terms where the description is LIKE $description__like. + * Default empty. + * @type bool $pad_counts Whether to pad the quantity of a term's children in the quantity + * of each term's "count" object variable. Default false. + * @type string $get Whether to return terms regardless of ancestry or whether the terms + * are empty. Accepts 'all' or empty (disabled). Default empty. + * @type int $child_of Term ID to retrieve child terms of. If multiple taxonomies + * are passed, $child_of is ignored. Default 0. + * @type int|string $parent Parent term ID to retrieve direct-child terms of. Default empty. + * @type bool $childless True to limit results to terms that have no children. This parameter has + * no effect on non-hierarchical taxonomies. Default false. + * @type string $cache_domain Unique cache key to be produced when this query is stored in an + * object cache. Default is 'core'. + * } + * @return array|int|WP_Error List of Term Objects and their children. Will return WP_Error, if any of $taxonomies + * do not exist. */ -function &get_terms($taxonomies, $args = '') { +function get_terms( $taxonomies, $args = '' ) { global $wpdb; $empty_array = array(); - $single_taxonomy = false; - if ( !is_array($taxonomies) ) { - $single_taxonomy = true; - $taxonomies = array($taxonomies); + $single_taxonomy = ! is_array( $taxonomies ) || 1 === count( $taxonomies ); + if ( ! is_array( $taxonomies ) ) { + $taxonomies = array( $taxonomies ); } foreach ( $taxonomies as $taxonomy ) { if ( ! taxonomy_exists($taxonomy) ) { - $error = & new WP_Error('invalid_taxonomy', __('Invalid Taxonomy')); - return $error; + return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy' ) ); } } $defaults = array('orderby' => 'name', 'order' => 'ASC', 'hide_empty' => true, 'exclude' => array(), 'exclude_tree' => array(), 'include' => array(), - 'number' => '', 'fields' => 'all', 'slug' => '', 'parent' => '', - 'hierarchical' => true, 'child_of' => 0, 'get' => '', 'name__like' => '', - 'pad_counts' => false, 'offset' => '', 'search' => ''); + 'number' => '', 'fields' => 'all', 'name' => '', 'slug' => '', 'parent' => '', 'childless' => false, + 'hierarchical' => true, 'child_of' => 0, 'get' => '', 'name__like' => '', 'description__like' => '', + 'pad_counts' => false, 'offset' => '', 'search' => '', 'cache_domain' => 'core' ); $args = wp_parse_args( $args, $defaults ); $args['number'] = absint( $args['number'] ); $args['offset'] = absint( $args['offset'] ); - if ( !$single_taxonomy || !is_taxonomy_hierarchical($taxonomies[0]) || - '' !== $args['parent'] ) { - $args['child_of'] = 0; + + // Save queries by not crawling the tree in the case of multiple taxes or a flat tax. + $has_hierarchical_tax = false; + foreach ( $taxonomies as $_tax ) { + if ( is_taxonomy_hierarchical( $_tax ) ) { + $has_hierarchical_tax = true; + } + } + + if ( ! $has_hierarchical_tax ) { $args['hierarchical'] = false; $args['pad_counts'] = false; } + // 'parent' overrides 'child_of'. + if ( 0 < intval( $args['parent'] ) ) { + $args['child_of'] = false; + } + if ( 'all' == $args['get'] ) { + $args['childless'] = false; $args['child_of'] = 0; $args['hide_empty'] = 0; $args['hierarchical'] = false; $args['pad_counts'] = false; } + /** + * Filter the terms query arguments. + * + * @since 3.1.0 + * + * @param array $args An array of get_term() arguments. + * @param array $taxonomies An array of taxonomies. + */ $args = apply_filters( 'get_terms_args', $args, $taxonomies ); - extract($args, EXTR_SKIP); + // Avoid the query if the queried parent/child_of term has no descendants. + $child_of = $args['child_of']; + $parent = $args['parent']; if ( $child_of ) { - $hierarchy = _get_term_hierarchy($taxonomies[0]); - if ( !isset($hierarchy[$child_of]) ) - return $empty_array; + $_parent = $child_of; + } elseif ( $parent ) { + $_parent = $parent; + } else { + $_parent = false; } - if ( $parent ) { - $hierarchy = _get_term_hierarchy($taxonomies[0]); - if ( !isset($hierarchy[$parent]) ) + if ( $_parent ) { + $in_hierarchy = false; + foreach ( $taxonomies as $_tax ) { + $hierarchy = _get_term_hierarchy( $_tax ); + + if ( isset( $hierarchy[ $_parent ] ) ) { + $in_hierarchy = true; + } + } + + if ( ! $in_hierarchy ) { return $empty_array; + } } - // $args can be whatever, only use the args defined in defaults to compute the key + // $args can be whatever, only use the args defined in defaults to compute the key. $filter_key = ( has_filter('list_terms_exclusions') ) ? serialize($GLOBALS['wp_filter']['list_terms_exclusions']) : ''; - $key = md5( serialize( compact(array_keys($defaults)) ) . serialize( $taxonomies ) . $filter_key ); - $last_changed = wp_cache_get('last_changed', 'terms'); - if ( !$last_changed ) { - $last_changed = time(); - wp_cache_set('last_changed', $last_changed, 'terms'); + $key = md5( serialize( wp_array_slice_assoc( $args, array_keys( $defaults ) ) ) . serialize( $taxonomies ) . $filter_key ); + $last_changed = wp_cache_get( 'last_changed', 'terms' ); + if ( ! $last_changed ) { + $last_changed = microtime(); + wp_cache_set( 'last_changed', $last_changed, 'terms' ); } $cache_key = "get_terms:$key:$last_changed"; $cache = wp_cache_get( $cache_key, 'terms' ); if ( false !== $cache ) { - $cache = apply_filters('get_terms', $cache, $taxonomies, $args); - return $cache; + + /** + * Filter the given taxonomy's terms cache. + * + * @since 2.3.0 + * + * @param array $cache Cached array of terms for the given taxonomy. + * @param array $taxonomies An array of taxonomies. + * @param array $args An array of get_terms() arguments. + */ + return apply_filters( 'get_terms', $cache, $taxonomies, $args ); } - $_orderby = strtolower($orderby); - if ( 'count' == $_orderby ) + $_orderby = strtolower( $args['orderby'] ); + if ( 'count' == $_orderby ) { $orderby = 'tt.count'; - else if ( 'name' == $_orderby ) + } elseif ( 'name' == $_orderby ) { $orderby = 't.name'; - else if ( 'slug' == $_orderby ) + } elseif ( 'slug' == $_orderby ) { $orderby = 't.slug'; - else if ( 'term_group' == $_orderby ) + } elseif ( 'include' == $_orderby && ! empty( $args['include'] ) ) { + $include = implode( ',', array_map( 'absint', $args['include'] ) ); + $orderby = "FIELD( t.term_id, $include )"; + } elseif ( 'term_group' == $_orderby ) { $orderby = 't.term_group'; - else if ( 'none' == $_orderby ) + } elseif ( 'description' == $_orderby ) { + $orderby = 'tt.description'; + } elseif ( 'none' == $_orderby ) { $orderby = ''; - elseif ( empty($_orderby) || 'id' == $_orderby ) + } elseif ( empty($_orderby) || 'id' == $_orderby ) { $orderby = 't.term_id'; + } else { + $orderby = 't.name'; + } - $orderby = apply_filters( 'get_terms_orderby', $orderby, $args ); + /** + * Filter the ORDERBY clause of the terms query. + * + * @since 2.8.0 + * + * @param string $orderby `ORDERBY` clause of the terms query. + * @param array $args An array of terms query arguments. + * @param array $taxonomies An array of taxonomies. + */ + $orderby = apply_filters( 'get_terms_orderby', $orderby, $args, $taxonomies ); - if ( !empty($orderby) ) + $order = strtoupper( $args['order'] ); + if ( ! empty( $orderby ) ) { $orderby = "ORDER BY $orderby"; - else + } else { $order = ''; + } + + if ( '' !== $order && ! in_array( $order, array( 'ASC', 'DESC' ) ) ) { + $order = 'ASC'; + } $where = "tt.taxonomy IN ('" . implode("', '", $taxonomies) . "')"; + + $exclude = $args['exclude']; + $exclude_tree = $args['exclude_tree']; + $include = $args['include']; + $inclusions = ''; - if ( !empty($include) ) { + if ( ! empty( $include ) ) { $exclude = ''; $exclude_tree = ''; - $interms = wp_parse_id_list($include); - foreach ( $interms as $interm ) { - if ( empty($inclusions) ) - $inclusions = ' AND ( t.term_id = ' . intval($interm) . ' '; - else - $inclusions .= ' OR t.term_id = ' . intval($interm) . ' '; + $inclusions = implode( ',', wp_parse_id_list( $include ) ); + } + + if ( ! empty( $inclusions ) ) { + $inclusions = ' AND t.term_id IN ( ' . $inclusions . ' )'; + $where .= $inclusions; + } + + $exclusions = array(); + if ( ! empty( $exclude_tree ) ) { + $exclude_tree = wp_parse_id_list( $exclude_tree ); + $excluded_children = $exclude_tree; + foreach ( $exclude_tree as $extrunk ) { + $excluded_children = array_merge( + $excluded_children, + (array) get_terms( $taxonomies[0], array( 'child_of' => intval( $extrunk ), 'fields' => 'ids', 'hide_empty' => 0 ) ) + ); } + $exclusions = array_merge( $excluded_children, $exclusions ); } - if ( !empty($inclusions) ) - $inclusions .= ')'; - $where .= $inclusions; + if ( ! empty( $exclude ) ) { + $exclusions = array_merge( wp_parse_id_list( $exclude ), $exclusions ); + } - $exclusions = ''; - if ( !empty( $exclude_tree ) ) { - $excluded_trunks = wp_parse_id_list($exclude_tree); - foreach ( $excluded_trunks as $extrunk ) { - $excluded_children = (array) get_terms($taxonomies[0], array('child_of' => intval($extrunk), 'fields' => 'ids', 'hide_empty' => 0)); - $excluded_children[] = $extrunk; - foreach( $excluded_children as $exterm ) { - if ( empty($exclusions) ) - $exclusions = ' AND ( t.term_id <> ' . intval($exterm) . ' '; - else - $exclusions .= ' AND t.term_id <> ' . intval($exterm) . ' '; - } + // 'childless' terms are those without an entry in the flattened term hierarchy. + $childless = (bool) $args['childless']; + if ( $childless ) { + foreach ( $taxonomies as $_tax ) { + $term_hierarchy = _get_term_hierarchy( $_tax ); + $exclusions = array_merge( array_keys( $term_hierarchy ), $exclusions ); } } - if ( !empty($exclude) ) { - $exterms = wp_parse_id_list($exclude); - foreach ( $exterms as $exterm ) { - if ( empty($exclusions) ) - $exclusions = ' AND ( t.term_id <> ' . intval($exterm) . ' '; - else - $exclusions .= ' AND t.term_id <> ' . intval($exterm) . ' '; + if ( ! empty( $exclusions ) ) { + $exclusions = ' AND t.term_id NOT IN (' . implode( ',', array_map( 'intval', $exclusions ) ) . ')'; + } else { + $exclusions = ''; + } + + /** + * Filter the terms to exclude from the terms query. + * + * @since 2.3.0 + * + * @param string $exclusions `NOT IN` clause of the terms query. + * @param array $args An array of terms query arguments. + * @param array $taxonomies An array of taxonomies. + */ + $exclusions = apply_filters( 'list_terms_exclusions', $exclusions, $args, $taxonomies ); + + if ( ! empty( $exclusions ) ) { + $where .= $exclusions; + } + + if ( ! empty( $args['name'] ) ) { + $names = (array) $args['name']; + foreach ( $names as &$_name ) { + $_name = sanitize_term_field( 'name', $_name, 0, reset( $taxonomies ), 'db' ); } + + $where .= " AND t.name IN ('" . implode( "', '", array_map( 'esc_sql', $names ) ) . "')"; } - if ( !empty($exclusions) ) - $exclusions .= ')'; - $exclusions = apply_filters('list_terms_exclusions', $exclusions, $args ); - $where .= $exclusions; + if ( ! empty( $args['slug'] ) ) { + if ( is_array( $args['slug'] ) ) { + $slug = array_map( 'sanitize_title', $args['slug'] ); + $where .= " AND t.slug IN ('" . implode( "', '", $slug ) . "')"; + } else { + $slug = sanitize_title( $args['slug'] ); + $where .= " AND t.slug = '$slug'"; + } + } - if ( !empty($slug) ) { - $slug = sanitize_title($slug); - $where .= " AND t.slug = '$slug'"; + if ( ! empty( $args['name__like'] ) ) { + $where .= $wpdb->prepare( " AND t.name LIKE %s", '%' . $wpdb->esc_like( $args['name__like'] ) . '%' ); } - if ( !empty($name__like) ) { - $name__like = like_escape( $name__like ); - $where .= $wpdb->prepare( " AND t.name LIKE %s", $name__like . '%' ); + if ( ! empty( $args['description__like'] ) ) { + $where .= $wpdb->prepare( " AND tt.description LIKE %s", '%' . $wpdb->esc_like( $args['description__like'] ) . '%' ); } if ( '' !== $parent ) { @@ -1265,144 +1907,209 @@ function &get_terms($taxonomies, $args = '') { $where .= " AND tt.parent = '$parent'"; } - if ( $hide_empty && !$hierarchical ) + $hierarchical = $args['hierarchical']; + if ( 'count' == $args['fields'] ) { + $hierarchical = false; + } + if ( $args['hide_empty'] && !$hierarchical ) { $where .= ' AND tt.count > 0'; + } + + $number = $args['number']; + $offset = $args['offset']; - // don't limit the query results when we have to descend the family tree - if ( ! empty($number) && ! $hierarchical && empty( $child_of ) && '' === $parent ) { - if ( $offset ) + // Don't limit the query results when we have to descend the family tree. + if ( $number && ! $hierarchical && ! $child_of && '' === $parent ) { + if ( $offset ) { $limits = 'LIMIT ' . $offset . ',' . $number; - else + } else { $limits = 'LIMIT ' . $number; + } } else { $limits = ''; } - if ( !empty($search) ) { - $search = like_escape($search); - $where .= $wpdb->prepare( " AND (t.name LIKE %s)", '%' . $search . '%'); + if ( ! empty( $args['search'] ) ) { + $like = '%' . $wpdb->esc_like( $args['search'] ) . '%'; + $where .= $wpdb->prepare( ' AND ((t.name LIKE %s) OR (t.slug LIKE %s))', $like, $like ); } $selects = array(); - switch ( $fields ) { + switch ( $args['fields'] ) { case 'all': - $selects = array('t.*', 'tt.*'); + $selects = array( 't.*', 'tt.*' ); break; case 'ids': case 'id=>parent': - $selects = array('t.term_id', 'tt.parent', 'tt.count'); + $selects = array( 't.term_id', 'tt.parent', 'tt.count', 'tt.taxonomy' ); break; case 'names': - $selects = array('t.term_id', 'tt.parent', 'tt.count', 't.name'); + $selects = array( 't.term_id', 'tt.parent', 'tt.count', 't.name', 'tt.taxonomy' ); break; case 'count': $orderby = ''; $order = ''; - $selects = array('COUNT(*)'); + $selects = array( 'COUNT(*)' ); + break; + case 'id=>name': + $selects = array( 't.term_id', 't.name', 'tt.count', 'tt.taxonomy' ); + break; + case 'id=>slug': + $selects = array( 't.term_id', 't.slug', 'tt.count', 'tt.taxonomy' ); + break; } - $_fields = $fields; + $_fields = $args['fields']; - $fields = implode(', ', apply_filters( 'get_terms_fields', $selects, $args )); + /** + * Filter the fields to select in the terms query. + * + * Field lists modified using this filter will only modify the term fields returned + * by the function when the `$fields` parameter set to 'count' or 'all'. In all other + * cases, the term fields in the results array will be determined by the `$fields` + * parameter alone. + * + * Use of this filter can result in unpredictable behavior, and is not recommended. + * + * @since 2.8.0 + * + * @param array $selects An array of fields to select for the terms query. + * @param array $args An array of term query arguments. + * @param array $taxonomies An array of taxonomies. + */ + $fields = implode( ', ', apply_filters( 'get_terms_fields', $selects, $args, $taxonomies ) ); $join = "INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id"; $pieces = array( 'fields', 'join', 'where', 'orderby', 'order', 'limits' ); + + /** + * Filter the terms query SQL clauses. + * + * @since 3.1.0 + * + * @param array $pieces Terms query SQL clauses. + * @param array $taxonomies An array of taxonomies. + * @param array $args An array of terms query arguments. + */ $clauses = apply_filters( 'terms_clauses', compact( $pieces ), $taxonomies, $args ); - foreach ( $pieces as $piece ) - $$piece = isset( $clauses[ $piece ] ) ? $clauses[ $piece ] : ''; - $query = "SELECT $fields FROM $wpdb->terms AS t $join WHERE $where $orderby $order $limits"; + $fields = isset( $clauses[ 'fields' ] ) ? $clauses[ 'fields' ] : ''; + $join = isset( $clauses[ 'join' ] ) ? $clauses[ 'join' ] : ''; + $where = isset( $clauses[ 'where' ] ) ? $clauses[ 'where' ] : ''; + $orderby = isset( $clauses[ 'orderby' ] ) ? $clauses[ 'orderby' ] : ''; + $order = isset( $clauses[ 'order' ] ) ? $clauses[ 'order' ] : ''; + $limits = isset( $clauses[ 'limits' ] ) ? $clauses[ 'limits' ] : ''; - $fields = $_fields; + $query = "SELECT $fields FROM $wpdb->terms AS t $join WHERE $where $orderby $order $limits"; - if ( 'count' == $fields ) { - $term_count = $wpdb->get_var($query); - return $term_count; + if ( 'count' == $_fields ) { + return $wpdb->get_var( $query ); } $terms = $wpdb->get_results($query); - if ( 'all' == $fields ) { - update_term_cache($terms); + if ( 'all' == $_fields ) { + update_term_cache( $terms ); } if ( empty($terms) ) { - wp_cache_add( $cache_key, array(), 'terms', 86400 ); // one day - $terms = apply_filters('get_terms', array(), $taxonomies, $args); - return $terms; + wp_cache_add( $cache_key, array(), 'terms', DAY_IN_SECONDS ); + + /** This filter is documented in wp-includes/taxonomy.php */ + return apply_filters( 'get_terms', array(), $taxonomies, $args ); } if ( $child_of ) { - $children = _get_term_hierarchy($taxonomies[0]); - if ( ! empty($children) ) - $terms = & _get_term_children($child_of, $terms, $taxonomies[0]); + foreach ( $taxonomies as $_tax ) { + $children = _get_term_hierarchy( $_tax ); + if ( ! empty( $children ) ) { + $terms = _get_term_children( $child_of, $terms, $_tax ); + } + } } // Update term counts to include children. - if ( $pad_counts && 'all' == $fields ) - _pad_term_counts($terms, $taxonomies[0]); + if ( $args['pad_counts'] && 'all' == $_fields ) { + foreach ( $taxonomies as $_tax ) { + _pad_term_counts( $terms, $_tax ); + } + } // Make sure we show empty categories that have children. - if ( $hierarchical && $hide_empty && is_array($terms) ) { + if ( $hierarchical && $args['hide_empty'] && is_array( $terms ) ) { foreach ( $terms as $k => $term ) { if ( ! $term->count ) { - $children = _get_term_children($term->term_id, $terms, $taxonomies[0]); - if ( is_array($children) ) - foreach ( $children as $child ) - if ( $child->count ) + $children = get_term_children( $term->term_id, $term->taxonomy ); + if ( is_array( $children ) ) { + foreach ( $children as $child_id ) { + $child = get_term( $child_id, $term->taxonomy ); + if ( $child->count ) { continue 2; + } + } + } - // It really is empty + // It really is empty. unset($terms[$k]); } } } - reset ( $terms ); $_terms = array(); - if ( 'id=>parent' == $fields ) { - while ( $term = array_shift($terms) ) - $_terms[$term->term_id] = $term->parent; - $terms = $_terms; - } elseif ( 'ids' == $fields ) { - while ( $term = array_shift($terms) ) + if ( 'id=>parent' == $_fields ) { + foreach ( $terms as $term ) { + $_terms[ $term->term_id ] = $term->parent; + } + } elseif ( 'ids' == $_fields ) { + foreach ( $terms as $term ) { $_terms[] = $term->term_id; - $terms = $_terms; - } elseif ( 'names' == $fields ) { - while ( $term = array_shift($terms) ) + } + } elseif ( 'names' == $_fields ) { + foreach ( $terms as $term ) { $_terms[] = $term->name; + } + } elseif ( 'id=>name' == $_fields ) { + foreach ( $terms as $term ) { + $_terms[ $term->term_id ] = $term->name; + } + } elseif ( 'id=>slug' == $_fields ) { + foreach ( $terms as $term ) { + $_terms[ $term->term_id ] = $term->slug; + } + } + + if ( ! empty( $_terms ) ) { $terms = $_terms; } - if ( 0 < $number && intval(@count($terms)) > $number ) { - $terms = array_slice($terms, $offset, $number); + if ( $number && is_array( $terms ) && count( $terms ) > $number ) { + $terms = array_slice( $terms, $offset, $number ); } - wp_cache_add( $cache_key, $terms, 'terms', 86400 ); // one day + wp_cache_add( $cache_key, $terms, 'terms', DAY_IN_SECONDS ); - $terms = apply_filters('get_terms', $terms, $taxonomies, $args); - return $terms; + /** This filter is documented in wp-includes/taxonomy */ + return apply_filters( 'get_terms', $terms, $taxonomies, $args ); } /** * Check if Term exists. * - * Returns the index of a defined term, or 0 (false) if the term doesn't exist. - * * Formerly is_term(), introduced in 2.3.0. * - * @package WordPress - * @subpackage Taxonomy * @since 3.0.0 * - * @uses $wpdb + * @global wpdb $wpdb WordPress database abstraction object. * - * @param int|string $term The term to check - * @param string $taxonomy The taxonomy name to use - * @param int $parent ID of parent term under which to confine the exists search. - * @return mixed Get the term id or Term Object, if exists. + * @param int|string $term The term to check + * @param string $taxonomy The taxonomy name to use + * @param int $parent Optional. ID of parent term under which to confine the exists search. + * @return mixed Returns null if the term does not exist. Returns the term ID + * if no taxonomy is specified and the term ID exists. Returns + * an array of the term ID and the term taxonomy ID the taxonomy + * is specified and the pairing exists. */ -function term_exists($term, $taxonomy = '', $parent = 0) { +function term_exists( $term, $taxonomy = '', $parent = null ) { global $wpdb; $select = "SELECT term_id FROM $wpdb->terms as t WHERE "; @@ -1418,18 +2125,18 @@ function term_exists($term, $taxonomy = '', $parent = 0) { return $wpdb->get_var( $wpdb->prepare( $select . $where, $term ) ); } - $term = trim( stripslashes( $term ) ); - - if ( '' === $slug = sanitize_title($term) ) - return 0; + $term = trim( wp_unslash( $term ) ); + $slug = sanitize_title( $term ); $where = 't.slug = %s'; $else_where = 't.name = %s'; $where_fields = array($slug); $else_where_fields = array($term); + $orderby = 'ORDER BY t.term_id ASC'; + $limit = 'LIMIT 1'; if ( !empty($taxonomy) ) { - $parent = (int) $parent; - if ( $parent > 0 ) { + if ( is_numeric( $parent ) ) { + $parent = (int) $parent; $where_fields[] = $parent; $else_where_fields[] = $parent; $where .= ' AND tt.parent = %d'; @@ -1439,48 +2146,65 @@ function term_exists($term, $taxonomy = '', $parent = 0) { $where_fields[] = $taxonomy; $else_where_fields[] = $taxonomy; - if ( $result = $wpdb->get_row( $wpdb->prepare("SELECT tt.term_id, tt.term_taxonomy_id FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy as tt ON tt.term_id = t.term_id WHERE $where AND tt.taxonomy = %s", $where_fields), ARRAY_A) ) + if ( $result = $wpdb->get_row( $wpdb->prepare("SELECT tt.term_id, tt.term_taxonomy_id FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy as tt ON tt.term_id = t.term_id WHERE $where AND tt.taxonomy = %s $orderby $limit", $where_fields), ARRAY_A) ) return $result; - return $wpdb->get_row( $wpdb->prepare("SELECT tt.term_id, tt.term_taxonomy_id FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy as tt ON tt.term_id = t.term_id WHERE $else_where AND tt.taxonomy = %s", $else_where_fields), ARRAY_A); + return $wpdb->get_row( $wpdb->prepare("SELECT tt.term_id, tt.term_taxonomy_id FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy as tt ON tt.term_id = t.term_id WHERE $else_where AND tt.taxonomy = %s $orderby $limit", $else_where_fields), ARRAY_A); } - if ( $result = $wpdb->get_var( $wpdb->prepare("SELECT term_id FROM $wpdb->terms as t WHERE $where", $where_fields) ) ) + if ( $result = $wpdb->get_var( $wpdb->prepare("SELECT term_id FROM $wpdb->terms as t WHERE $where $orderby $limit", $where_fields) ) ) return $result; - return $wpdb->get_var( $wpdb->prepare("SELECT term_id FROM $wpdb->terms as t WHERE $else_where", $else_where_fields) ); + return $wpdb->get_var( $wpdb->prepare("SELECT term_id FROM $wpdb->terms as t WHERE $else_where $orderby $limit", $else_where_fields) ); +} + +/** + * Check if a term is an ancestor of another term. + * + * You can use either an id or the term object for both parameters. + * + * @since 3.4.0 + * + * @param int|object $term1 ID or object to check if this is the parent term. + * @param int|object $term2 The child term. + * @param string $taxonomy Taxonomy name that $term1 and `$term2` belong to. + * @return bool Whether `$term2` is a child of `$term1`. + */ +function term_is_ancestor_of( $term1, $term2, $taxonomy ) { + if ( ! isset( $term1->term_id ) ) + $term1 = get_term( $term1, $taxonomy ); + if ( ! isset( $term2->parent ) ) + $term2 = get_term( $term2, $taxonomy ); + + if ( empty( $term1->term_id ) || empty( $term2->parent ) ) + return false; + if ( $term2->parent == $term1->term_id ) + return true; + + return term_is_ancestor_of( $term1, get_term( $term2->parent, $taxonomy ), $taxonomy ); } /** * Sanitize Term all fields. * - * Relys on sanitize_term_field() to sanitize the term. The difference is that + * Relies on sanitize_term_field() to sanitize the term. The difference is that * this function will sanitize all fields. The context is based * on sanitize_term_field(). * * The $term is expected to be either an array or an object. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 * - * @uses sanitize_term_field Used to sanitize all fields in a term - * - * @param array|object $term The term to check - * @param string $taxonomy The taxonomy name to use - * @param string $context Default is 'display'. - * @return array|object Term with all fields sanitized + * @param array|object $term The term to check. + * @param string $taxonomy The taxonomy name to use. + * @param string $context Optional. Context in which to sanitize the term. Accepts 'edit', 'db', + * 'display', 'attribute', or 'js'. Default 'display'. + * @return array|object Term with all fields sanitized. */ function sanitize_term($term, $taxonomy, $context = 'display') { + $fields = array( 'term_id', 'name', 'description', 'slug', 'count', 'parent', 'term_group', 'term_taxonomy_id', 'object_id' ); - if ( 'raw' == $context ) - return $term; - - $fields = array('term_id', 'name', 'description', 'slug', 'count', 'parent', 'term_group'); - - $do_object = false; - if ( is_object($term) ) - $do_object = true; + $do_object = is_object( $term ); $term_id = $do_object ? $term->term_id : (isset($term['term_id']) ? $term['term_id'] : 0); @@ -1515,21 +2239,19 @@ function sanitize_term($term, $taxonomy, $context = 'display') { * without creating your own filter function. Simply create a function that * hooks into the filter you need. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 * - * @uses $wpdb - * - * @param string $field Term field to sanitize - * @param string $value Search for this term value - * @param int $term_id Term ID - * @param string $taxonomy Taxonomy Name - * @param string $context Either edit, db, display, attribute, or js. - * @return mixed sanitized field + * @param string $field Term field to sanitize. + * @param string $value Search for this term value. + * @param int $term_id Term ID. + * @param string $taxonomy Taxonomy Name. + * @param string $context Context in which to sanitize the term field. Accepts 'edit', 'db', 'display', + * 'attribute', or 'js'. + * @return mixed Sanitized field. */ function sanitize_term_field($field, $value, $term_id, $taxonomy, $context) { - if ( 'parent' == $field || 'term_id' == $field || 'count' == $field || 'term_group' == $field ) { + $int_fields = array( 'parent', 'term_id', 'count', 'term_group', 'term_taxonomy_id', 'object_id' ); + if ( in_array( $field, $int_fields ) ) { $value = (int) $value; if ( $value < 0 ) $value = 0; @@ -1539,33 +2261,139 @@ function sanitize_term_field($field, $value, $term_id, $taxonomy, $context) { return $value; if ( 'edit' == $context ) { - $value = apply_filters("edit_term_{$field}", $value, $term_id, $taxonomy); - $value = apply_filters("edit_{$taxonomy}_{$field}", $value, $term_id); + + /** + * Filter a term field to edit before it is sanitized. + * + * The dynamic portion of the filter name, `$field`, refers to the term field. + * + * @since 2.3.0 + * + * @param mixed $value Value of the term field. + * @param int $term_id Term ID. + * @param string $taxonomy Taxonomy slug. + */ + $value = apply_filters( "edit_term_{$field}", $value, $term_id, $taxonomy ); + + /** + * Filter the taxonomy field to edit before it is sanitized. + * + * The dynamic portions of the filter name, `$taxonomy` and `$field`, refer + * to the taxonomy slug and taxonomy field, respectively. + * + * @since 2.3.0 + * + * @param mixed $value Value of the taxonomy field to edit. + * @param int $term_id Term ID. + */ + $value = apply_filters( "edit_{$taxonomy}_{$field}", $value, $term_id ); + if ( 'description' == $field ) $value = esc_html($value); // textarea_escaped else $value = esc_attr($value); - } else if ( 'db' == $context ) { - $value = apply_filters("pre_term_{$field}", $value, $taxonomy); - $value = apply_filters("pre_{$taxonomy}_{$field}", $value); + } elseif ( 'db' == $context ) { + + /** + * Filter a term field value before it is sanitized. + * + * The dynamic portion of the filter name, `$field`, refers to the term field. + * + * @since 2.3.0 + * + * @param mixed $value Value of the term field. + * @param string $taxonomy Taxonomy slug. + */ + $value = apply_filters( "pre_term_{$field}", $value, $taxonomy ); + + /** + * Filter a taxonomy field before it is sanitized. + * + * The dynamic portions of the filter name, `$taxonomy` and `$field`, refer + * to the taxonomy slug and field name, respectively. + * + * @since 2.3.0 + * + * @param mixed $value Value of the taxonomy field. + */ + $value = apply_filters( "pre_{$taxonomy}_{$field}", $value ); + // Back compat filters - if ( 'slug' == $field ) - $value = apply_filters('pre_category_nicename', $value); + if ( 'slug' == $field ) { + /** + * Filter the category nicename before it is sanitized. + * + * Use the pre_{$taxonomy}_{$field} hook instead. + * + * @since 2.0.3 + * + * @param string $value The category nicename. + */ + $value = apply_filters( 'pre_category_nicename', $value ); + } - } else if ( 'rss' == $context ) { - $value = apply_filters("term_{$field}_rss", $value, $taxonomy); - $value = apply_filters("{$taxonomy}_{$field}_rss", $value); + } elseif ( 'rss' == $context ) { + + /** + * Filter the term field for use in RSS. + * + * The dynamic portion of the filter name, `$field`, refers to the term field. + * + * @since 2.3.0 + * + * @param mixed $value Value of the term field. + * @param string $taxonomy Taxonomy slug. + */ + $value = apply_filters( "term_{$field}_rss", $value, $taxonomy ); + + /** + * Filter the taxonomy field for use in RSS. + * + * The dynamic portions of the hook name, `$taxonomy`, and `$field`, refer + * to the taxonomy slug and field name, respectively. + * + * @since 2.3.0 + * + * @param mixed $value Value of the taxonomy field. + */ + $value = apply_filters( "{$taxonomy}_{$field}_rss", $value ); } else { // Use display filters by default. - $value = apply_filters("term_{$field}", $value, $term_id, $taxonomy, $context); - $value = apply_filters("{$taxonomy}_{$field}", $value, $term_id, $context); + + /** + * Filter the term field sanitized for display. + * + * The dynamic portion of the filter name, `$field`, refers to the term field name. + * + * @since 2.3.0 + * + * @param mixed $value Value of the term field. + * @param int $term_id Term ID. + * @param string $taxonomy Taxonomy slug. + * @param string $context Context to retrieve the term field value. + */ + $value = apply_filters( "term_{$field}", $value, $term_id, $taxonomy, $context ); + + /** + * Filter the taxonomy field sanitized for display. + * + * The dynamic portions of the filter name, `$taxonomy`, and `$field`, refer + * to the taxonomy slug and taxonomy field, respectively. + * + * @since 2.3.0 + * + * @param mixed $value Value of the taxonomy field. + * @param int $term_id Term ID. + * @param string $context Context to retrieve the taxonomy field value. + */ + $value = apply_filters( "{$taxonomy}_{$field}", $value, $term_id, $context ); } - if ( 'attribute' == $context ) + if ( 'attribute' == $context ) { $value = esc_attr($value); - else if ( 'js' == $context ) + } elseif ( 'js' == $context ) { $value = esc_js($value); - + } return $value; } @@ -1574,16 +2402,13 @@ function sanitize_term_field($field, $value, $term_id, $taxonomy, $context) { * * Default $args is 'hide_empty' which can be 'hide_empty=true' or array('hide_empty' => true). * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3.0 + * @todo Document $args as a hash notation. * - * @uses get_terms() - * @uses wp_parse_args() Turns strings into arrays and merges defaults into an array. + * @since 2.3.0 * - * @param string $taxonomy Taxonomy name - * @param array|string $args Overwrite defaults. See get_terms() - * @return int How many terms are in $taxonomy + * @param string $taxonomy Taxonomy name + * @param array|string $args Overwrite defaults. See get_terms() + * @return array|int|WP_Error How many terms are in $taxonomy. WP_Error if $taxonomy does not exist. */ function wp_count_terms( $taxonomy, $args = array() ) { $defaults = array('hide_empty' => false); @@ -1607,29 +2432,21 @@ function wp_count_terms( $taxonomy, $args = array() ) { * a particular taxonomy or taxonomies. Does not remove the term or * taxonomy itself. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 - * @uses $wpdb * - * @param int $object_id The term Object Id that refers to the term + * @param int $object_id The term Object Id that refers to the term. * @param string|array $taxonomies List of Taxonomy Names or single Taxonomy name. */ function wp_delete_object_term_relationships( $object_id, $taxonomies ) { - global $wpdb; - $object_id = (int) $object_id; if ( !is_array($taxonomies) ) $taxonomies = array($taxonomies); foreach ( (array) $taxonomies as $taxonomy ) { - $tt_ids = wp_get_object_terms($object_id, $taxonomy, array('fields' => 'tt_ids')); - $in_tt_ids = "'" . implode("', '", $tt_ids) . "'"; - do_action( 'delete_term_relationships', $object_id, $tt_ids ); - $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->term_relationships WHERE object_id = %d AND term_taxonomy_id IN ($in_tt_ids)", $object_id) ); - do_action( 'deleted_term_relationships', $object_id, $tt_ids ); - wp_update_term_count($tt_ids, $taxonomy); + $term_ids = wp_get_object_terms( $object_id, $taxonomy, array( 'fields' => 'ids' ) ); + $term_ids = array_map( 'intval', $term_ids ); + wp_remove_object_terms( $object_id, $term_ids, $taxonomy ); } } @@ -1639,24 +2456,22 @@ function wp_delete_object_term_relationships( $object_id, $taxonomies ) { * If the term is a parent of other terms, then the children will be updated to * that term's parent. * - * The $args 'default' will only override the terms found, if there is only one + * The `$args` 'default' will only override the terms found, if there is only one * term found. Any other and the found terms are used. * * The $args 'force_default' will force the term supplied as default to be * assigned even if the object was not going to be termless - * @package WordPress - * @subpackage Taxonomy + * + * @todo Document $args as a hash notation. + * * @since 2.3.0 * - * @uses $wpdb - * @uses do_action() Calls both 'delete_term' and 'delete_$taxonomy' action - * hooks, passing term object, term id. 'delete_term' gets an additional - * parameter with the $taxonomy parameter. + * @global wpdb $wpdb WordPress database abstraction object. * - * @param int $term Term ID - * @param string $taxonomy Taxonomy Name - * @param array|string $args Optional. Change 'default' term id and override found term ids. - * @return bool|WP_Error Returns false if not term; true if completes delete action. + * @param int $term Term ID. + * @param string $taxonomy Taxonomy Name. + * @param array|string $args Optional. Change 'default' term id and override found term ids. + * @return bool|int|WP_Error Returns false if not term; true if completes delete action. */ function wp_delete_term( $term, $taxonomy, $args = array() ) { global $wpdb; @@ -1679,14 +2494,28 @@ function wp_delete_term( $term, $taxonomy, $args = array() ) { } $args = wp_parse_args($args, $defaults); - extract($args, EXTR_SKIP); - if ( isset( $default ) ) { - $default = (int) $default; - if ( ! term_exists($default, $taxonomy) ) - unset($default); + if ( isset( $args['default'] ) ) { + $default = (int) $args['default']; + if ( ! term_exists( $default, $taxonomy ) ) { + unset( $default ); + } + } + + if ( isset( $args['force_default'] ) ) { + $force_default = $args['force_default']; } + /** + * Fires when deleting a term, before any modifications are made to posts or terms. + * + * @since 4.1.0 + * + * @param int $term Term ID. + * @param string $taxonomy Taxonomy Name. + */ + do_action( 'pre_delete_term', $term, $taxonomy ); + // Update children to point to new parent if ( is_taxonomy_hierarchical($taxonomy) ) { $term_obj = get_term($term, $taxonomy); @@ -1694,9 +2523,31 @@ function wp_delete_term( $term, $taxonomy, $args = array() ) { return $term_obj; $parent = $term_obj->parent; - $edit_tt_ids = $wpdb->get_col( "SELECT `term_taxonomy_id` FROM $wpdb->term_taxonomy WHERE `parent` = " . (int)$term_obj->term_id ); + $edit_ids = $wpdb->get_results( "SELECT term_id, term_taxonomy_id FROM $wpdb->term_taxonomy WHERE `parent` = " . (int)$term_obj->term_id ); + $edit_tt_ids = wp_list_pluck( $edit_ids, 'term_taxonomy_id' ); + + /** + * Fires immediately before a term to delete's children are reassigned a parent. + * + * @since 2.9.0 + * + * @param array $edit_tt_ids An array of term taxonomy IDs for the given term. + */ do_action( 'edit_term_taxonomies', $edit_tt_ids ); + $wpdb->update( $wpdb->term_taxonomy, compact( 'parent' ), array( 'parent' => $term_obj->term_id) + compact( 'taxonomy' ) ); + + // Clean the cache for all child terms. + $edit_term_ids = wp_list_pluck( $edit_ids, 'term_id' ); + clean_term_cache( $edit_term_ids, $taxonomy ); + + /** + * Fires immediately after a term to delete's children are reassigned a parent. + * + * @since 2.9.0 + * + * @param array $edit_tt_ids An array of term taxonomy IDs for the given term. + */ do_action( 'edited_term_taxonomies', $edit_tt_ids ); } @@ -1715,23 +2566,66 @@ function wp_delete_term( $term, $taxonomy, $args = array() ) { wp_set_object_terms($object, $terms, $taxonomy); } - // Clean the relationship caches for all object types using this term + // Clean the relationship caches for all object types using this term. $tax_object = get_taxonomy( $taxonomy ); foreach ( $tax_object->object_type as $object_type ) clean_object_term_cache( $objects, $object_type ); - do_action( 'delete_term_taxonomy', $tt_id ); - $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->term_taxonomy WHERE term_taxonomy_id = %d", $tt_id ) ); - do_action( 'deleted_term_taxonomy', $tt_id ); + // Get the object before deletion so we can pass to actions below + $deleted_term = get_term( $term, $taxonomy ); - // Delete the term if no taxonomies use it. - if ( !$wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_taxonomy WHERE term_id = %d", $term) ) ) - $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->terms WHERE term_id = %d", $term) ); + /** + * Fires immediately before a term taxonomy ID is deleted. + * + * @since 2.9.0 + * + * @param int $tt_id Term taxonomy ID. + */ + do_action( 'delete_term_taxonomy', $tt_id ); + $wpdb->delete( $wpdb->term_taxonomy, array( 'term_taxonomy_id' => $tt_id ) ); + + /** + * Fires immediately after a term taxonomy ID is deleted. + * + * @since 2.9.0 + * + * @param int $tt_id Term taxonomy ID. + */ + do_action( 'deleted_term_taxonomy', $tt_id ); + + // Delete the term if no taxonomies use it. + if ( !$wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_taxonomy WHERE term_id = %d", $term) ) ) + $wpdb->delete( $wpdb->terms, array( 'term_id' => $term ) ); clean_term_cache($term, $taxonomy); - do_action('delete_term', $term, $tt_id, $taxonomy); - do_action("delete_$taxonomy", $term, $tt_id); + /** + * Fires after a term is deleted from the database and the cache is cleaned. + * + * @since 2.5.0 + * + * @param int $term Term ID. + * @param int $tt_id Term taxonomy ID. + * @param string $taxonomy Taxonomy slug. + * @param mixed $deleted_term Copy of the already-deleted term, in the form specified + * by the parent function. WP_Error otherwise. + */ + do_action( 'delete_term', $term, $tt_id, $taxonomy, $deleted_term ); + + /** + * Fires after a term in a specific taxonomy is deleted. + * + * The dynamic portion of the hook name, `$taxonomy`, refers to the specific + * taxonomy the term belonged to. + * + * @since 2.3.0 + * + * @param int $term Term ID. + * @param int $tt_id Term taxonomy ID. + * @param mixed $deleted_term Copy of the already-deleted term, in the form specified + * by the parent function. WP_Error otherwise. + */ + do_action( "delete_$taxonomy", $term, $tt_id, $deleted_term ); return true; } @@ -1740,10 +2634,9 @@ function wp_delete_term( $term, $taxonomy, $args = array() ) { * Deletes one existing category. * * @since 2.0.0 - * @uses wp_delete_term() * * @param int $cat_ID - * @return mixed Returns true if completes delete action; false if term doesnt exist; + * @return bool|int|WP_Error Returns true if completes delete action; false if term doesn't exist; * Zero on attempted deletion of default Category; WP_Error object is also a possibility. */ function wp_delete_category( $cat_ID ) { @@ -1753,51 +2646,52 @@ function wp_delete_category( $cat_ID ) { /** * Retrieves the terms associated with the given object(s), in the supplied taxonomies. * - * The following information has to do the $args parameter and for what can be - * contained in the string or array of that parameter, if it exists. - * - * The first argument is called, 'orderby' and has the default value of 'name'. - * The other value that is supported is 'count'. - * - * The second argument is called, 'order' and has the default value of 'ASC'. - * The only other value that will be acceptable is 'DESC'. - * - * The final argument supported is called, 'fields' and has the default value of - * 'all'. There are multiple other options that can be used instead. Supported - * values are as follows: 'all', 'ids', 'names', and finally - * 'all_with_object_id'. - * - * The fields argument also decides what will be returned. If 'all' or - * 'all_with_object_id' is choosen or the default kept intact, then all matching - * terms objects will be returned. If either 'ids' or 'names' is used, then an - * array of all matching term ids or term names will be returned respectively. - * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 - * @uses $wpdb + * @since 4.2.0 Added support for 'taxonomy', 'parent', and 'term_taxonomy_id' values of `$orderby`. + * Introduced `$parent` argument. * - * @param int|array $object_ids The ID(s) of the object(s) to retrieve. + * @global wpdb $wpdb WordPress database abstraction object. + * + * @param int|array $object_ids The ID(s) of the object(s) to retrieve. * @param string|array $taxonomies The taxonomies to retrieve terms from. - * @param array|string $args Change what is returned - * @return array|WP_Error The requested term data or empty array if no terms found. WP_Error if $taxonomy does not exist. + * @param array|string $args { + * Array of arguments. + * @type string $orderby Field by which results should be sorted. Accepts 'name', 'count', 'slug', 'term_group', + * 'term_order', 'taxonomy', 'parent', or 'term_taxonomy_id'. Default 'name'. + * @type string $order Sort order. Accepts 'ASC' or 'DESC'. Default 'ASC'. + * @type string $fields Fields to return for matched terms. Accepts 'all', 'ids', 'names', and + * 'all_with_object_id'. Note that 'all' or 'all_with_object_id' will result in an array of + * term objects being returned, 'ids' will return an array of integers, and 'names' an array + * of strings. + * @type int $parent Optional. Limit results to the direct children of a given term ID. + * } + * @return array|WP_Error The requested term data or empty array if no terms found. + * WP_Error if any of the $taxonomies don't exist. */ function wp_get_object_terms($object_ids, $taxonomies, $args = array()) { global $wpdb; + if ( empty( $object_ids ) || empty( $taxonomies ) ) + return array(); + if ( !is_array($taxonomies) ) $taxonomies = array($taxonomies); - foreach ( (array) $taxonomies as $taxonomy ) { + foreach ( $taxonomies as $taxonomy ) { if ( ! taxonomy_exists($taxonomy) ) - return new WP_Error('invalid_taxonomy', __('Invalid Taxonomy')); + return new WP_Error('invalid_taxonomy', __('Invalid taxonomy')); } if ( !is_array($object_ids) ) $object_ids = array($object_ids); $object_ids = array_map('intval', $object_ids); - $defaults = array('orderby' => 'name', 'order' => 'ASC', 'fields' => 'all'); + $defaults = array( + 'orderby' => 'name', + 'order' => 'ASC', + 'fields' => 'all', + 'parent' => '', + ); $args = wp_parse_args( $args, $defaults ); $terms = array(); @@ -1815,19 +2709,17 @@ function wp_get_object_terms($object_ids, $taxonomies, $args = array()) { $args = array_merge($args, $t->args); } - extract($args, EXTR_SKIP); + $orderby = $args['orderby']; + $order = $args['order']; + $fields = $args['fields']; - if ( 'count' == $orderby ) - $orderby = 'tt.count'; - else if ( 'name' == $orderby ) - $orderby = 't.name'; - else if ( 'slug' == $orderby ) - $orderby = 't.slug'; - else if ( 'term_group' == $orderby ) - $orderby = 't.term_group'; - else if ( 'term_order' == $orderby ) + if ( in_array( $orderby, array( 'term_id', 'name', 'slug', 'term_group' ) ) ) { + $orderby = "t.$orderby"; + } elseif ( in_array( $orderby, array( 'count', 'parent', 'taxonomy', 'term_taxonomy_id' ) ) ) { + $orderby = "tt.$orderby"; + } elseif ( 'term_order' === $orderby ) { $orderby = 'tr.term_order'; - else if ( 'none' == $orderby ) { + } elseif ( 'none' === $orderby ) { $orderby = ''; $order = ''; } else { @@ -1841,191 +2733,351 @@ function wp_get_object_terms($object_ids, $taxonomies, $args = array()) { if ( !empty($orderby) ) $orderby = "ORDER BY $orderby"; + $order = strtoupper( $order ); + if ( '' !== $order && ! in_array( $order, array( 'ASC', 'DESC' ) ) ) + $order = 'ASC'; + + $taxonomy_array = $taxonomies; + $object_id_array = $object_ids; $taxonomies = "'" . implode("', '", $taxonomies) . "'"; $object_ids = implode(', ', $object_ids); $select_this = ''; - if ( 'all' == $fields ) + if ( 'all' == $fields ) { $select_this = 't.*, tt.*'; - else if ( 'ids' == $fields ) + } elseif ( 'ids' == $fields ) { $select_this = 't.term_id'; - else if ( 'names' == $fields ) + } elseif ( 'names' == $fields ) { $select_this = 't.name'; - else if ( 'all_with_object_id' == $fields ) + } elseif ( 'slugs' == $fields ) { + $select_this = 't.slug'; + } elseif ( 'all_with_object_id' == $fields ) { $select_this = 't.*, tt.*, tr.object_id'; + } + + $where = array( + "tt.taxonomy IN ($taxonomies)", + "tr.object_id IN ($object_ids)", + ); + + if ( '' !== $args['parent'] ) { + $where[] = $wpdb->prepare( 'tt.parent = %d', $args['parent'] ); + } - $query = "SELECT $select_this FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON tt.term_id = t.term_id INNER JOIN $wpdb->term_relationships AS tr ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy IN ($taxonomies) AND tr.object_id IN ($object_ids) $orderby $order"; + $where = implode( ' AND ', $where ); + $query = "SELECT $select_this FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON tt.term_id = t.term_id INNER JOIN $wpdb->term_relationships AS tr ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE $where $orderby $order"; + + $objects = false; if ( 'all' == $fields || 'all_with_object_id' == $fields ) { - $terms = array_merge($terms, $wpdb->get_results($query)); - update_term_cache($terms); - } else if ( 'ids' == $fields || 'names' == $fields ) { - $terms = array_merge($terms, $wpdb->get_col($query)); - } else if ( 'tt_ids' == $fields ) { + $_terms = $wpdb->get_results( $query ); + foreach ( $_terms as $key => $term ) { + $_terms[$key] = sanitize_term( $term, $taxonomy, 'raw' ); + } + $terms = array_merge( $terms, $_terms ); + update_term_cache( $terms ); + $objects = true; + } elseif ( 'ids' == $fields || 'names' == $fields || 'slugs' == $fields ) { + $_terms = $wpdb->get_col( $query ); + $_field = ( 'ids' == $fields ) ? 'term_id' : 'name'; + foreach ( $_terms as $key => $term ) { + $_terms[$key] = sanitize_term_field( $_field, $term, $term, $taxonomy, 'raw' ); + } + $terms = array_merge( $terms, $_terms ); + } elseif ( 'tt_ids' == $fields ) { $terms = $wpdb->get_col("SELECT tr.term_taxonomy_id FROM $wpdb->term_relationships AS tr INNER JOIN $wpdb->term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tr.object_id IN ($object_ids) AND tt.taxonomy IN ($taxonomies) $orderby $order"); + foreach ( $terms as $key => $tt_id ) { + $terms[$key] = sanitize_term_field( 'term_taxonomy_id', $tt_id, 0, $taxonomy, 'raw' ); // 0 should be the term id, however is not needed when using raw context. + } } - if ( ! $terms ) + if ( ! $terms ) { $terms = array(); + } elseif ( $objects && 'all_with_object_id' !== $fields ) { + $_tt_ids = array(); + $_terms = array(); + foreach ( $terms as $term ) { + if ( in_array( $term->term_taxonomy_id, $_tt_ids ) ) { + continue; + } + + $_tt_ids[] = $term->term_taxonomy_id; + $_terms[] = $term; + } + $terms = $_terms; + } elseif ( ! $objects ) { + $terms = array_values( array_unique( $terms ) ); + } - return apply_filters('wp_get_object_terms', $terms, $object_ids, $taxonomies, $args); + /** + * Filter the terms for a given object or objects. + * + * @since 4.2.0 + * + * @param array $terms An array of terms for the given object or objects. + * @param array $object_id_array Array of object IDs for which `$terms` were retrieved. + * @param array $taxonomy_array Array of taxonomies from which `$terms` were retrieved. + * @param array $args An array of arguments for retrieving terms for the given + * object(s). See wp_get_object_terms() for details. + */ + $terms = apply_filters( 'get_object_terms', $terms, $object_id_array, $taxonomy_array, $args ); + + /** + * Filter the terms for a given object or objects. + * + * The `$taxonomies` parameter passed to this filter is formatted as a SQL fragment. The + * {@see 'get_object_terms'} filter is recommended as an alternative. + * + * @since 2.8.0 + * + * @param array $terms An array of terms for the given object or objects. + * @param int|array $object_ids Object ID or array of IDs. + * @param string $taxonomies SQL-formatted (comma-separated and quoted) list of taxonomy names. + * @param array $args An array of arguments for retrieving terms for the given object(s). + * See {@see wp_get_object_terms()} for details. + */ + return apply_filters( 'wp_get_object_terms', $terms, $object_ids, $taxonomies, $args ); } /** - * Adds a new term to the database. Optionally marks it as an alias of an existing term. + * Add a new term to the database. * - * Error handling is assigned for the nonexistance of the $taxonomy and $term - * parameters before inserting. If both the term id and taxonomy exist - * previously, then an array will be returned that contains the term id and the - * contents of what is returned. The keys of the array are 'term_id' and - * 'term_taxonomy_id' containing numeric values. + * A non-existent term is inserted in the following sequence: + * 1. The term is added to the term table, then related to the taxonomy. + * 2. If everything is correct, several actions are fired. + * 3. The 'term_id_filter' is evaluated. + * 4. The term cache is cleaned. + * 5. Several more actions are fired. + * 6. An array is returned containing the term_id and term_taxonomy_id. * - * It is assumed that the term does not yet exist or the above will apply. The - * term will be first added to the term table and then related to the taxonomy - * if everything is well. If everything is correct, then several actions will be - * run prior to a filter and then several actions will be run after the filter - * is run. + * If the 'slug' argument is not empty, then it is checked to see if the term + * is invalid. If it is not a valid, existing term, it is added and the term_id + * is given. * - * The arguments decide how the term is handled based on the $args parameter. - * The following is a list of the available overrides and the defaults. - * - * 'alias_of'. There is no default, but if added, expected is the slug that the - * term will be an alias of. Expected to be a string. - * - * 'description'. There is no default. If exists, will be added to the database - * along with the term. Expected to be a string. - * - * 'parent'. Expected to be numeric and default is 0 (zero). Will assign value - * of 'parent' to the term. - * - * 'slug'. Expected to be a string. There is no default. + * If the taxonomy is hierarchical, and the 'parent' argument is not empty, + * the term is inserted and the term_id will be given. + + * Error handling: + * If $taxonomy does not exist or $term is empty, + * a WP_Error object will be returned. * - * If 'slug' argument exists then the slug will be checked to see if it is not - * a valid term. If that check succeeds (it is not a valid term), then it is - * added and the term id is given. If it fails, then a check is made to whether - * the taxonomy is hierarchical and the parent argument is not empty. If the - * second check succeeds, the term will be inserted and the term id will be - * given. + * If the term already exists on the same hierarchical level, + * or the term slug and name are not unique, a WP_Error object will be returned. * - * @package WordPress - * @subpackage Taxonomy + * @global wpdb $wpdb WordPress database abstraction object. + * @since 2.3.0 - * @uses $wpdb * - * @uses apply_filters() Calls 'pre_insert_term' hook with term and taxonomy as parameters. - * @uses do_action() Calls 'create_term' hook with the term id and taxonomy id as parameters. - * @uses do_action() Calls 'create_$taxonomy' hook with term id and taxonomy id as parameters. - * @uses apply_filters() Calls 'term_id_filter' hook with term id and taxonomy id as parameters. - * @uses do_action() Calls 'created_term' hook with the term id and taxonomy id as parameters. - * @uses do_action() Calls 'created_$taxonomy' hook with term id and taxonomy id as parameters. - * - * @param string $term The term to add or update. - * @param string $taxonomy The taxonomy to which to add the term - * @param array|string $args Change the values of the inserted term - * @return array|WP_Error The Term ID and Term Taxonomy ID + * @param string $term The term to add or update. + * @param string $taxonomy The taxonomy to which to add the term. + * @param array|string $args { + * Optional. Array or string of arguments for inserting a term. + * + * @type string $alias_of Slug of the term to make this term an alias of. + * Default empty string. Accepts a term slug. + * @type string $description The term description. Default empty string. + * @type int $parent The id of the parent term. Default 0. + * @type string $slug The term slug to use. Default empty string. + * } + * @return array|WP_Error An array containing the `term_id` and `term_taxonomy_id`, + * {@see WP_Error} otherwise. */ function wp_insert_term( $term, $taxonomy, $args = array() ) { global $wpdb; - if ( ! taxonomy_exists($taxonomy) ) + if ( ! taxonomy_exists($taxonomy) ) { return new WP_Error('invalid_taxonomy', __('Invalid taxonomy')); - + } + /** + * Filter a term before it is sanitized and inserted into the database. + * + * @since 3.0.0 + * + * @param string $term The term to add or update. + * @param string $taxonomy Taxonomy slug. + */ $term = apply_filters( 'pre_insert_term', $term, $taxonomy ); - if ( is_wp_error( $term ) ) - return $term; - - if ( is_int($term) && 0 == $term ) + if ( is_wp_error( $term ) ) { + return $term; + } + if ( is_int($term) && 0 == $term ) { return new WP_Error('invalid_term_id', __('Invalid term ID')); - - if ( '' == trim($term) ) + } + if ( '' == trim($term) ) { return new WP_Error('empty_term_name', __('A name is required for this term')); - + } $defaults = array( 'alias_of' => '', 'description' => '', 'parent' => 0, 'slug' => ''); - $args = wp_parse_args($args, $defaults); + $args = wp_parse_args( $args, $defaults ); + + if ( $args['parent'] > 0 && ! term_exists( (int) $args['parent'] ) ) { + return new WP_Error( 'missing_parent', __( 'Parent term does not exist.' ) ); + } $args['name'] = $term; $args['taxonomy'] = $taxonomy; $args = sanitize_term($args, $taxonomy, 'db'); - extract($args, EXTR_SKIP); // expected_slashed ($name) - $name = stripslashes($name); - $description = stripslashes($description); + $name = wp_unslash( $args['name'] ); + $description = wp_unslash( $args['description'] ); + $parent = (int) $args['parent']; - if ( empty($slug) ) - $slug = sanitize_title($name); + $slug_provided = ! empty( $args['slug'] ); + if ( ! $slug_provided ) { + $slug = sanitize_title( $name ); + } else { + $slug = $args['slug']; + } $term_group = 0; - if ( $alias_of ) { - $alias = $wpdb->get_row( $wpdb->prepare( "SELECT term_id, term_group FROM $wpdb->terms WHERE slug = %s", $alias_of) ); - if ( $alias->term_group ) { + if ( $args['alias_of'] ) { + $alias = get_term_by( 'slug', $args['alias_of'], $taxonomy ); + if ( ! empty( $alias->term_group ) ) { // The alias we want is already in a group, so let's use that one. $term_group = $alias->term_group; - } else { - // The alias isn't in a group, so let's create a new one and firstly add the alias term to it. + } elseif ( ! empty( $alias->term_id ) ) { + /* + * The alias is not in a group, so we create a new one + * and add the alias to it. + */ $term_group = $wpdb->get_var("SELECT MAX(term_group) FROM $wpdb->terms") + 1; - do_action( 'edit_terms', $alias->term_id ); - $wpdb->update($wpdb->terms, compact('term_group'), array('term_id' => $alias->term_id) ); - do_action( 'edited_terms', $alias->term_id ); + + wp_update_term( $alias->term_id, $taxonomy, array( + 'term_group' => $term_group, + ) ); } } - if ( $term_id = term_exists($slug) ) { - $existing_term = $wpdb->get_row( $wpdb->prepare( "SELECT name FROM $wpdb->terms WHERE term_id = %d", $term_id), ARRAY_A ); - // We've got an existing term in the same taxonomy, which matches the name of the new term: - if ( is_taxonomy_hierarchical($taxonomy) && $existing_term['name'] == $name && $exists = term_exists( (int) $term_id, $taxonomy ) ) { - // Hierarchical, and it matches an existing term, Do not allow same "name" in the same level. - $siblings = get_terms($taxonomy, array('fields' => 'names', 'get' => 'all', 'parent' => (int)$parent) ); - if ( in_array($name, $siblings) ) { - return new WP_Error('term_exists', __('A term with the name provided already exists with this parent.'), $exists['term_id']); + /* + * Prevent the creation of terms with duplicate names at the same level of a taxonomy hierarchy, + * unless a unique slug has been explicitly provided. + */ + if ( $name_match = get_term_by( 'name', $name, $taxonomy ) ) { + $slug_match = get_term_by( 'slug', $slug, $taxonomy ); + if ( ! $slug_provided || $name_match->slug === $slug || $slug_match ) { + if ( is_taxonomy_hierarchical( $taxonomy ) ) { + $siblings = get_terms( $taxonomy, array( 'get' => 'all', 'parent' => $parent ) ); + + $existing_term = null; + if ( $name_match->slug === $slug && in_array( $name, wp_list_pluck( $siblings, 'name' ) ) ) { + $existing_term = $name_match; + } elseif ( $slug_match && in_array( $slug, wp_list_pluck( $siblings, 'slug' ) ) ) { + $existing_term = $slug_match; + } + + if ( $existing_term ) { + return new WP_Error( 'term_exists', __( 'A term with the name provided already exists with this parent.' ), $existing_term->term_id ); + } } else { - $slug = wp_unique_term_slug($slug, (object) $args); - if ( false === $wpdb->insert( $wpdb->terms, compact( 'name', 'slug', 'term_group' ) ) ) - return new WP_Error('db_insert_error', __('Could not insert term into the database'), $wpdb->last_error); - $term_id = (int) $wpdb->insert_id; + return new WP_Error( 'term_exists', __( 'A term with the name provided already exists in this taxonomy.' ), $name_match->term_id ); } - } elseif ( $existing_term['name'] != $name ) { - // We've got an existing term, with a different name, Create the new term. - $slug = wp_unique_term_slug($slug, (object) $args); - if ( false === $wpdb->insert( $wpdb->terms, compact( 'name', 'slug', 'term_group' ) ) ) - return new WP_Error('db_insert_error', __('Could not insert term into the database'), $wpdb->last_error); - $term_id = (int) $wpdb->insert_id; - } elseif ( $exists = term_exists( (int) $term_id, $taxonomy ) ) { - // Same name, same slug. - return new WP_Error('term_exists', __('A term with the name provided already exists.'), $exists['term_id']); } - } else { - // This term does not exist at all in the database, Create it. - $slug = wp_unique_term_slug($slug, (object) $args); - if ( false === $wpdb->insert( $wpdb->terms, compact( 'name', 'slug', 'term_group' ) ) ) - return new WP_Error('db_insert_error', __('Could not insert term into the database'), $wpdb->last_error); - $term_id = (int) $wpdb->insert_id; } + $slug = wp_unique_term_slug( $slug, (object) $args ); + + if ( false === $wpdb->insert( $wpdb->terms, compact( 'name', 'slug', 'term_group' ) ) ) { + return new WP_Error( 'db_insert_error', __( 'Could not insert term into the database' ), $wpdb->last_error ); + } + + $term_id = (int) $wpdb->insert_id; + // Seems unreachable, However, Is used in the case that a term name is provided, which sanitizes to an empty string. if ( empty($slug) ) { $slug = sanitize_title($slug, $term_id); - do_action( 'edit_terms', $term_id ); + + /** This action is documented in wp-includes/taxonomy.php */ + do_action( 'edit_terms', $term_id, $taxonomy ); $wpdb->update( $wpdb->terms, compact( 'slug' ), compact( 'term_id' ) ); - do_action( 'edited_terms', $term_id ); + + /** This action is documented in wp-includes/taxonomy.php */ + do_action( 'edited_terms', $term_id, $taxonomy ); } $tt_id = $wpdb->get_var( $wpdb->prepare( "SELECT tt.term_taxonomy_id FROM $wpdb->term_taxonomy AS tt INNER JOIN $wpdb->terms AS t ON tt.term_id = t.term_id WHERE tt.taxonomy = %s AND t.term_id = %d", $taxonomy, $term_id ) ); - if ( !empty($tt_id) ) + if ( !empty($tt_id) ) { return array('term_id' => $term_id, 'term_taxonomy_id' => $tt_id); - + } $wpdb->insert( $wpdb->term_taxonomy, compact( 'term_id', 'taxonomy', 'description', 'parent') + array( 'count' => 0 ) ); $tt_id = (int) $wpdb->insert_id; - do_action("create_term", $term_id, $tt_id, $taxonomy); - do_action("create_$taxonomy", $term_id, $tt_id); + /* + * Sanity check: if we just created a term with the same parent + taxonomy + slug but a higher term_id than + * an existing term, then we have unwittingly created a duplicate term. Delete the dupe, and use the term_id + * and term_taxonomy_id of the older term instead. Then return out of the function so that the "create" hooks + * are not fired. + */ + $duplicate_term = $wpdb->get_row( $wpdb->prepare( "SELECT t.term_id, tt.term_taxonomy_id FROM $wpdb->terms t INNER JOIN $wpdb->term_taxonomy tt ON ( tt.term_id = t.term_id ) WHERE t.slug = %s AND tt.parent = %d AND tt.taxonomy = %s AND t.term_id < %d AND tt.term_taxonomy_id != %d", $slug, $parent, $taxonomy, $term_id, $tt_id ) ); + if ( $duplicate_term ) { + $wpdb->delete( $wpdb->terms, array( 'term_id' => $term_id ) ); + $wpdb->delete( $wpdb->term_taxonomy, array( 'term_taxonomy_id' => $tt_id ) ); - $term_id = apply_filters('term_id_filter', $term_id, $tt_id); + $term_id = (int) $duplicate_term->term_id; + $tt_id = (int) $duplicate_term->term_taxonomy_id; + + clean_term_cache( $term_id, $taxonomy ); + return array( 'term_id' => $term_id, 'term_taxonomy_id' => $tt_id ); + } + + /** + * Fires immediately after a new term is created, before the term cache is cleaned. + * + * @since 2.3.0 + * + * @param int $term_id Term ID. + * @param int $tt_id Term taxonomy ID. + * @param string $taxonomy Taxonomy slug. + */ + do_action( "create_term", $term_id, $tt_id, $taxonomy ); + + /** + * Fires after a new term is created for a specific taxonomy. + * + * The dynamic portion of the hook name, `$taxonomy`, refers + * to the slug of the taxonomy the term was created for. + * + * @since 2.3.0 + * + * @param int $term_id Term ID. + * @param int $tt_id Term taxonomy ID. + */ + do_action( "create_$taxonomy", $term_id, $tt_id ); + + /** + * Filter the term ID after a new term is created. + * + * @since 2.3.0 + * + * @param int $term_id Term ID. + * @param int $tt_id Taxonomy term ID. + */ + $term_id = apply_filters( 'term_id_filter', $term_id, $tt_id ); clean_term_cache($term_id, $taxonomy); - do_action("created_term", $term_id, $tt_id, $taxonomy); - do_action("created_$taxonomy", $term_id, $tt_id); + /** + * Fires after a new term is created, and after the term cache has been cleaned. + * + * @since 2.3.0 + * + * @param int $term_id Term ID. + * @param int $tt_id Term taxonomy ID. + * @param string $taxonomy Taxonomy slug. + */ + do_action( 'created_term', $term_id, $tt_id, $taxonomy ); + + /** + * Fires after a new term in a specific taxonomy is created, and after the term + * cache has been cleaned. + * + * The dynamic portion of the hook name, `$taxonomy`, refers to the taxonomy slug. + * + * @since 2.3.0 + * + * @param int $term_id Term ID. + * @param int $tt_id Term taxonomy ID. + */ + do_action( "created_$taxonomy", $term_id, $tt_id ); return array('term_id' => $term_id, 'term_taxonomy_id' => $tt_id); } @@ -2041,25 +3093,24 @@ function wp_insert_term( $term, $taxonomy, $args = array() ) { * A term has no meaning until it is given context by defining which taxonomy it * exists under. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 - * @uses $wpdb * - * @param int $object_id The object to relate to. - * @param array|int|string $terms The slug or id of the term, will replace all existing - * related terms in this taxonomy. - * @param array|string $taxonomy The context in which to relate the term to the object. - * @param bool $append If false will delete difference of terms. - * @return array|WP_Error Affected Term IDs + * @global wpdb $wpdb The WordPress database abstraction object. + * + * @param int $object_id The object to relate to. + * @param array|int|string $terms A single term slug, single term id, or array of either term slugs or ids. + * Will replace all existing related terms in this taxonomy. + * @param string $taxonomy The context in which to relate the term to the object. + * @param bool $append Optional. If false will delete difference of terms. Default false. + * @return array|WP_Error Affected Term IDs. */ -function wp_set_object_terms($object_id, $terms, $taxonomy, $append = false) { +function wp_set_object_terms( $object_id, $terms, $taxonomy, $append = false ) { global $wpdb; $object_id = (int) $object_id; if ( ! taxonomy_exists($taxonomy) ) - return new WP_Error('invalid_taxonomy', __('Invalid Taxonomy')); + return new WP_Error('invalid_taxonomy', __('Invalid taxonomy')); if ( !is_array($terms) ) $terms = array($terms); @@ -2071,6 +3122,7 @@ function wp_set_object_terms($object_id, $terms, $taxonomy, $append = false) { $tt_ids = array(); $term_ids = array(); + $new_tt_ids = array(); foreach ( (array) $terms as $term) { if ( !strlen(trim($term)) ) @@ -2090,21 +3142,45 @@ function wp_set_object_terms($object_id, $terms, $taxonomy, $append = false) { if ( $wpdb->get_var( $wpdb->prepare( "SELECT term_taxonomy_id FROM $wpdb->term_relationships WHERE object_id = %d AND term_taxonomy_id = %d", $object_id, $tt_id ) ) ) continue; + + /** + * Fires immediately before an object-term relationship is added. + * + * @since 2.9.0 + * + * @param int $object_id Object ID. + * @param int $tt_id Term taxonomy ID. + */ do_action( 'add_term_relationship', $object_id, $tt_id ); $wpdb->insert( $wpdb->term_relationships, array( 'object_id' => $object_id, 'term_taxonomy_id' => $tt_id ) ); + + /** + * Fires immediately after an object-term relationship is added. + * + * @since 2.9.0 + * + * @param int $object_id Object ID. + * @param int $tt_id Term taxonomy ID. + */ do_action( 'added_term_relationship', $object_id, $tt_id ); + $new_tt_ids[] = $tt_id; } - wp_update_term_count($tt_ids, $taxonomy); + if ( $new_tt_ids ) + wp_update_term_count( $new_tt_ids, $taxonomy ); if ( ! $append ) { - $delete_terms = array_diff($old_tt_ids, $tt_ids); - if ( $delete_terms ) { - $in_delete_terms = "'" . implode("', '", $delete_terms) . "'"; - do_action( 'delete_term_relationships', $object_id, $delete_terms ); - $wpdb->query( $wpdb->prepare("DELETE FROM $wpdb->term_relationships WHERE object_id = %d AND term_taxonomy_id IN ($in_delete_terms)", $object_id) ); - do_action( 'deleted_term_relationships', $object_id, $delete_terms ); - wp_update_term_count($delete_terms, $taxonomy); + $delete_tt_ids = array_diff( $old_tt_ids, $tt_ids ); + + if ( $delete_tt_ids ) { + $in_delete_tt_ids = "'" . implode( "', '", $delete_tt_ids ) . "'"; + $delete_term_ids = $wpdb->get_col( $wpdb->prepare( "SELECT tt.term_id FROM $wpdb->term_taxonomy AS tt WHERE tt.taxonomy = %s AND tt.term_taxonomy_id IN ($in_delete_tt_ids)", $taxonomy ) ); + $delete_term_ids = array_map( 'intval', $delete_term_ids ); + + $remove = wp_remove_object_terms( $object_id, $delete_term_ids, $taxonomy ); + if ( is_wp_error( $remove ) ) { + return $remove; + } } } @@ -2117,17 +3193,124 @@ function wp_set_object_terms($object_id, $terms, $taxonomy, $append = false) { if ( in_array($tt_id, $final_tt_ids) ) $values[] = $wpdb->prepare( "(%d, %d, %d)", $object_id, $tt_id, ++$term_order); if ( $values ) - $wpdb->query("INSERT INTO $wpdb->term_relationships (object_id, term_taxonomy_id, term_order) VALUES " . join(',', $values) . " ON DUPLICATE KEY UPDATE term_order = VALUES(term_order)"); + if ( false === $wpdb->query( "INSERT INTO $wpdb->term_relationships (object_id, term_taxonomy_id, term_order) VALUES " . join( ',', $values ) . " ON DUPLICATE KEY UPDATE term_order = VALUES(term_order)" ) ) + return new WP_Error( 'db_insert_error', __( 'Could not insert term relationship into the database' ), $wpdb->last_error ); } - do_action('set_object_terms', $object_id, $terms, $tt_ids, $taxonomy, $append, $old_tt_ids); + wp_cache_delete( $object_id, $taxonomy . '_relationships' ); + + /** + * Fires after an object's terms have been set. + * + * @since 2.8.0 + * + * @param int $object_id Object ID. + * @param array $terms An array of object terms. + * @param array $tt_ids An array of term taxonomy IDs. + * @param string $taxonomy Taxonomy slug. + * @param bool $append Whether to append new terms to the old terms. + * @param array $old_tt_ids Old array of term taxonomy IDs. + */ + do_action( 'set_object_terms', $object_id, $terms, $tt_ids, $taxonomy, $append, $old_tt_ids ); return $tt_ids; } +/** + * Add term(s) associated with a given object. + * + * @since 3.6.0 + * + * @param int $object_id The ID of the object to which the terms will be added. + * @param array|int|string $terms The slug(s) or ID(s) of the term(s) to add. + * @param array|string $taxonomy Taxonomy name. + * @return array|WP_Error Affected Term IDs + */ +function wp_add_object_terms( $object_id, $terms, $taxonomy ) { + return wp_set_object_terms( $object_id, $terms, $taxonomy, true ); +} + +/** + * Remove term(s) associated with a given object. + * + * @since 3.6.0 + * + * @global wpdb $wpdb WordPress database abstraction object. + * + * @param int $object_id The ID of the object from which the terms will be removed. + * @param array|int|string $terms The slug(s) or ID(s) of the term(s) to remove. + * @param array|string $taxonomy Taxonomy name. + * @return bool|WP_Error True on success, false or WP_Error on failure. + */ +function wp_remove_object_terms( $object_id, $terms, $taxonomy ) { + global $wpdb; + + $object_id = (int) $object_id; + + if ( ! taxonomy_exists( $taxonomy ) ) { + return new WP_Error( 'invalid_taxonomy', __( 'Invalid Taxonomy' ) ); + } + + if ( ! is_array( $terms ) ) { + $terms = array( $terms ); + } + + $tt_ids = array(); + + foreach ( (array) $terms as $term ) { + if ( ! strlen( trim( $term ) ) ) { + continue; + } + + if ( ! $term_info = term_exists( $term, $taxonomy ) ) { + // Skip if a non-existent term ID is passed. + if ( is_int( $term ) ) { + continue; + } + } + + if ( is_wp_error( $term_info ) ) { + return $term_info; + } + + $tt_ids[] = $term_info['term_taxonomy_id']; + } + + if ( $tt_ids ) { + $in_tt_ids = "'" . implode( "', '", $tt_ids ) . "'"; + + /** + * Fires immediately before an object-term relationship is deleted. + * + * @since 2.9.0 + * + * @param int $object_id Object ID. + * @param array $tt_ids An array of term taxonomy IDs. + */ + do_action( 'delete_term_relationships', $object_id, $tt_ids ); + $deleted = $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->term_relationships WHERE object_id = %d AND term_taxonomy_id IN ($in_tt_ids)", $object_id ) ); + + /** + * Fires immediately after an object-term relationship is deleted. + * + * @since 2.9.0 + * + * @param int $object_id Object ID. + * @param array $tt_ids An array of term taxonomy IDs. + */ + do_action( 'deleted_term_relationships', $object_id, $tt_ids ); + + wp_update_term_count( $tt_ids, $taxonomy ); + + return (bool) $deleted; + } + + return false; +} + /** * Will make slug unique, if it isn't already. * - * The $slug has to be unique global to every taxonomy, meaning that one + * The `$slug` has to be unique global to every taxonomy, meaning that one * taxonomy term can't have a matching slug with another taxonomy term. Each * slug has to be globally unique for every taxonomy. * @@ -2135,36 +3318,44 @@ function wp_set_object_terms($object_id, $terms, $taxonomy, $append = false) { * hierarchical and has a parent, it will append that parent to the $slug. * * If that still doesn't return an unique slug, then it try to append a number - * until it finds a number that is truely unique. + * until it finds a number that is truly unique. * - * The only purpose for $term is for appending a parent, if one exists. + * The only purpose for `$term` is for appending a parent, if one exists. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 - * @uses $wpdb * - * @param string $slug The string that will be tried for a unique slug - * @param object $term The term object that the $slug will belong too + * @global wpdb $wpdb WordPress database abstraction object. + * + * @param string $slug The string that will be tried for a unique slug. + * @param object $term The term object that the `$slug` will belong to. * @return string Will return a true unique slug. */ -function wp_unique_term_slug($slug, $term) { +function wp_unique_term_slug( $slug, $term ) { global $wpdb; - if ( ! term_exists( $slug ) ) - return $slug; + $needs_suffix = true; + $original_slug = $slug; + + // As of 4.1, duplicate slugs are allowed as long as they're in different taxonomies. + if ( ! term_exists( $slug ) || get_option( 'db_version' ) >= 30133 && ! get_term_by( 'slug', $slug, $term->taxonomy ) ) { + $needs_suffix = false; + } - // If the taxonomy supports hierarchy and the term has a parent, make the slug unique - // by incorporating parent slugs. - if ( is_taxonomy_hierarchical($term->taxonomy) && !empty($term->parent) ) { + /* + * If the taxonomy supports hierarchy and the term has a parent, make the slug unique + * by incorporating parent slugs. + */ + $parent_suffix = ''; + if ( $needs_suffix && is_taxonomy_hierarchical( $term->taxonomy ) && ! empty( $term->parent ) ) { $the_parent = $term->parent; while ( ! empty($the_parent) ) { $parent_term = get_term($the_parent, $term->taxonomy); if ( is_wp_error($parent_term) || empty($parent_term) ) break; - $slug .= '-' . $parent_term->slug; - if ( ! term_exists( $slug ) ) - return $slug; + $parent_suffix .= '-' . $parent_term->slug; + if ( ! term_exists( $slug . $parent_suffix ) ) { + break; + } if ( empty($parent_term->parent) ) break; @@ -2173,22 +3364,47 @@ function wp_unique_term_slug($slug, $term) { } // If we didn't get a unique slug, try appending a number to make it unique. - if ( !empty($args['term_id']) ) - $query = $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s AND term_id != %d", $slug, $args['term_id'] ); - else - $query = $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s", $slug ); - if ( $wpdb->get_var( $query ) ) { - $num = 2; - do { - $alt_slug = $slug . "-$num"; - $num++; - $slug_check = $wpdb->get_var( $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s", $alt_slug ) ); - } while ( $slug_check ); - $slug = $alt_slug; + /** + * Filter whether the proposed unique term slug is bad. + * + * @since 4.3.0 + * + * @param bool $needs_suffix Whether the slug needs to be made unique with a suffix. + * @param string $slug The slug. + * @param object $term Term object. + */ + if ( apply_filters( 'wp_unique_term_slug_is_bad_slug', $needs_suffix, $slug, $term ) ) { + if ( $parent_suffix ) { + $slug .= $parent_suffix; + } else { + if ( ! empty( $term->term_id ) ) + $query = $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s AND term_id != %d", $slug, $term->term_id ); + else + $query = $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s", $slug ); + + if ( $wpdb->get_var( $query ) ) { + $num = 2; + do { + $alt_slug = $slug . "-$num"; + $num++; + $slug_check = $wpdb->get_var( $wpdb->prepare( "SELECT slug FROM $wpdb->terms WHERE slug = %s", $alt_slug ) ); + } while ( $slug_check ); + $slug = $alt_slug; + } + } } - return $slug; + /** + * Filter the unique term slug. + * + * @since 4.3.0 + * + * @param string $slug Unique term slug. + * @param object $term Term object. + * @param string $original_slug Slug originally passed to the function for testing. + */ + return apply_filters( 'wp_unique_term_slug', $slug, $term, $original_slug ); } /** @@ -2209,39 +3425,40 @@ function wp_unique_term_slug($slug, $term) { * a WP_Error will be passed back. If you don't pass any slug, then a unique one * will be created for you. * - * For what can be overrode in $args, check the term scheme can contain and stay + * For what can be overrode in `$args`, check the term scheme can contain and stay * away from the term keys. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 * - * @uses $wpdb - * @uses do_action() Will call both 'edit_term' and 'edit_$taxonomy' twice. - * @uses apply_filters() Will call the 'term_id_filter' filter and pass the term - * id and taxonomy id. + * @global wpdb $wpdb WordPress database abstraction object. * - * @param int $term_id The ID of the term - * @param string $taxonomy The context in which to relate the term to the object. - * @param array|string $args Overwrite term field values + * @param int $term_id The ID of the term + * @param string $taxonomy The context in which to relate the term to the object. + * @param array|string $args Optional. Array of get_terms() arguments. Default empty array. * @return array|WP_Error Returns Term ID and Taxonomy Term ID */ function wp_update_term( $term_id, $taxonomy, $args = array() ) { global $wpdb; - if ( ! taxonomy_exists($taxonomy) ) - return new WP_Error('invalid_taxonomy', __('Invalid taxonomy')); + if ( ! taxonomy_exists( $taxonomy ) ) { + return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy' ) ); + } $term_id = (int) $term_id; // First, get all of the original args - $term = get_term ($term_id, $taxonomy, ARRAY_A); + $term = get_term( $term_id, $taxonomy, ARRAY_A ); - if ( is_wp_error( $term ) ) + if ( is_wp_error( $term ) ) { return $term; + } + + if ( ! $term ) { + return new WP_Error( 'invalid_term', __( 'Empty Term' ) ); + } // Escape data pulled from DB. - $term = add_magic_quotes($term); + $term = wp_slash($term); // Merge old and new args with new args overwriting old ones. $args = array_merge($term, $args); @@ -2249,41 +3466,71 @@ function wp_update_term( $term_id, $taxonomy, $args = array() ) { $defaults = array( 'alias_of' => '', 'description' => '', 'parent' => 0, 'slug' => ''); $args = wp_parse_args($args, $defaults); $args = sanitize_term($args, $taxonomy, 'db'); - extract($args, EXTR_SKIP); + $parsed_args = $args; // expected_slashed ($name) - $name = stripslashes($name); - $description = stripslashes($description); + $name = wp_unslash( $args['name'] ); + $description = wp_unslash( $args['description'] ); + + $parsed_args['name'] = $name; + $parsed_args['description'] = $description; if ( '' == trim($name) ) return new WP_Error('empty_term_name', __('A name is required for this term')); + if ( $parsed_args['parent'] > 0 && ! term_exists( (int) $parsed_args['parent'] ) ) { + return new WP_Error( 'missing_parent', __( 'Parent term does not exist.' ) ); + } + $empty_slug = false; - if ( empty($slug) ) { + if ( empty( $args['slug'] ) ) { $empty_slug = true; $slug = sanitize_title($name); + } else { + $slug = $args['slug']; } - if ( $alias_of ) { - $alias = $wpdb->get_row( $wpdb->prepare( "SELECT term_id, term_group FROM $wpdb->terms WHERE slug = %s", $alias_of) ); - if ( $alias->term_group ) { + $parsed_args['slug'] = $slug; + + $term_group = isset( $parsed_args['term_group'] ) ? $parsed_args['term_group'] : 0; + if ( $args['alias_of'] ) { + $alias = get_term_by( 'slug', $args['alias_of'], $taxonomy ); + if ( ! empty( $alias->term_group ) ) { // The alias we want is already in a group, so let's use that one. $term_group = $alias->term_group; - } else { - // The alias isn't in a group, so let's create a new one and firstly add the alias term to it. + } elseif ( ! empty( $alias->term_id ) ) { + /* + * The alias is not in a group, so we create a new one + * and add the alias to it. + */ $term_group = $wpdb->get_var("SELECT MAX(term_group) FROM $wpdb->terms") + 1; - do_action( 'edit_terms', $alias->term_id ); - $wpdb->update( $wpdb->terms, compact('term_group'), array( 'term_id' => $alias->term_id ) ); - do_action( 'edited_terms', $alias->term_id ); + + wp_update_term( $alias->term_id, $taxonomy, array( + 'term_group' => $term_group, + ) ); } + + $parsed_args['term_group'] = $term_group; } - // Check $parent to see if it will cause a hierarchy loop - $parent = apply_filters( 'wp_update_term_parent', $parent, $term_id, $taxonomy, compact( array_keys( $args ) ), $args ); + /** + * Filter the term parent. + * + * Hook to this filter to see if it will cause a hierarchy loop. + * + * @since 3.1.0 + * + * @param int $parent ID of the parent term. + * @param int $term_id Term ID. + * @param string $taxonomy Taxonomy slug. + * @param array $parsed_args An array of potentially altered update arguments for the given term. + * @param array $args An array of update arguments for the given term. + */ + $parent = apply_filters( 'wp_update_term_parent', $args['parent'], $term_id, $taxonomy, $parsed_args, $args ); // Check for duplicate slug - $id = $wpdb->get_var( $wpdb->prepare( "SELECT term_id FROM $wpdb->terms WHERE slug = %s", $slug ) ); - if ( $id && ($id != $term_id) ) { + $duplicate = get_term_by( 'slug', $slug, $taxonomy ); + if ( $duplicate && $duplicate->term_id != $term_id ) { // If an empty slug was passed or the parent changed, reset the slug to something unique. // Otherwise, bail. if ( $empty_slug || ( $parent != $term['parent']) ) @@ -2291,28 +3538,121 @@ function wp_update_term( $term_id, $taxonomy, $args = array() ) { else return new WP_Error('duplicate_term_slug', sprintf(__('The slug “%s” is already in use by another term'), $slug)); } - do_action( 'edit_terms', $term_id ); + + $tt_id = $wpdb->get_var( $wpdb->prepare( "SELECT tt.term_taxonomy_id FROM $wpdb->term_taxonomy AS tt INNER JOIN $wpdb->terms AS t ON tt.term_id = t.term_id WHERE tt.taxonomy = %s AND t.term_id = %d", $taxonomy, $term_id) ); + + // Check whether this is a shared term that needs splitting. + $_term_id = _split_shared_term( $term_id, $tt_id ); + if ( ! is_wp_error( $_term_id ) ) { + $term_id = $_term_id; + } + + /** + * Fires immediately before the given terms are edited. + * + * @since 2.9.0 + * + * @param int $term_id Term ID. + * @param string $taxonomy Taxonomy slug. + */ + do_action( 'edit_terms', $term_id, $taxonomy ); $wpdb->update($wpdb->terms, compact( 'name', 'slug', 'term_group' ), compact( 'term_id' ) ); if ( empty($slug) ) { $slug = sanitize_title($name, $term_id); $wpdb->update( $wpdb->terms, compact( 'slug' ), compact( 'term_id' ) ); } - do_action( 'edited_terms', $term_id ); - $tt_id = $wpdb->get_var( $wpdb->prepare( "SELECT tt.term_taxonomy_id FROM $wpdb->term_taxonomy AS tt INNER JOIN $wpdb->terms AS t ON tt.term_id = t.term_id WHERE tt.taxonomy = %s AND t.term_id = %d", $taxonomy, $term_id) ); + /** + * Fires immediately after the given terms are edited. + * + * @since 2.9.0 + * + * @param int $term_id Term ID + * @param string $taxonomy Taxonomy slug. + */ + do_action( 'edited_terms', $term_id, $taxonomy ); + + /** + * Fires immediate before a term-taxonomy relationship is updated. + * + * @since 2.9.0 + * + * @param int $tt_id Term taxonomy ID. + * @param string $taxonomy Taxonomy slug. + */ do_action( 'edit_term_taxonomy', $tt_id, $taxonomy ); + $wpdb->update( $wpdb->term_taxonomy, compact( 'term_id', 'taxonomy', 'description', 'parent' ), array( 'term_taxonomy_id' => $tt_id ) ); + + /** + * Fires immediately after a term-taxonomy relationship is updated. + * + * @since 2.9.0 + * + * @param int $tt_id Term taxonomy ID. + * @param string $taxonomy Taxonomy slug. + */ do_action( 'edited_term_taxonomy', $tt_id, $taxonomy ); - do_action("edit_term", $term_id, $tt_id, $taxonomy); - do_action("edit_$taxonomy", $term_id, $tt_id); + // Clean the relationship caches for all object types using this term. + $objects = $wpdb->get_col( $wpdb->prepare( "SELECT object_id FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $tt_id ) ); + $tax_object = get_taxonomy( $taxonomy ); + foreach ( $tax_object->object_type as $object_type ) { + clean_object_term_cache( $objects, $object_type ); + } + + /** + * Fires after a term has been updated, but before the term cache has been cleaned. + * + * @since 2.3.0 + * + * @param int $term_id Term ID. + * @param int $tt_id Term taxonomy ID. + * @param string $taxonomy Taxonomy slug. + */ + do_action( "edit_term", $term_id, $tt_id, $taxonomy ); + + /** + * Fires after a term in a specific taxonomy has been updated, but before the term + * cache has been cleaned. + * + * The dynamic portion of the hook name, `$taxonomy`, refers to the taxonomy slug. + * + * @since 2.3.0 + * + * @param int $term_id Term ID. + * @param int $tt_id Term taxonomy ID. + */ + do_action( "edit_$taxonomy", $term_id, $tt_id ); - $term_id = apply_filters('term_id_filter', $term_id, $tt_id); + /** This filter is documented in wp-includes/taxonomy.php */ + $term_id = apply_filters( 'term_id_filter', $term_id, $tt_id ); clean_term_cache($term_id, $taxonomy); - do_action("edited_term", $term_id, $tt_id, $taxonomy); - do_action("edited_$taxonomy", $term_id, $tt_id); + /** + * Fires after a term has been updated, and the term cache has been cleaned. + * + * @since 2.3.0 + * + * @param int $term_id Term ID. + * @param int $tt_id Term taxonomy ID. + * @param string $taxonomy Taxonomy slug. + */ + do_action( "edited_term", $term_id, $tt_id, $taxonomy ); + + /** + * Fires after a term for a specific taxonomy has been updated, and the term + * cache has been cleaned. + * + * The dynamic portion of the hook name, `$taxonomy`, refers to the taxonomy slug. + * + * @since 2.3.0 + * + * @param int $term_id Term ID. + * @param int $tt_id Term taxonomy ID. + */ + do_action( "edited_$taxonomy", $term_id, $tt_id ); return array('term_id' => $term_id, 'term_taxonomy_id' => $tt_id); } @@ -2322,6 +3662,8 @@ function wp_update_term( $term_id, $taxonomy, $args = array() ) { * * @since 2.5.0 * + * @staticvar bool $_defer + * * @param bool $defer Optional. Enable if true, disable if false. * @return bool Whether term counting is enabled or disabled. */ @@ -2341,19 +3683,18 @@ function wp_defer_term_counting($defer=null) { /** * Updates the amount of terms in taxonomy. * - * If there is a taxonomy callback applyed, then it will be called for updating + * If there is a taxonomy callback applied, then it will be called for updating * the count. * * The default action is to count what the amount of terms have the relationship * of term ID. Once that is done, then update the database. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 - * @uses $wpdb * - * @param int|array $terms The term_taxonomy_id of the terms - * @param string $taxonomy The context of the term. + * @staticvar array $_deferred + * + * @param int|array $terms The term_taxonomy_id of the terms. + * @param string $taxonomy The context of the term. * @return bool If no terms will return false, and if successful will return true. */ function wp_update_term_count( $terms, $taxonomy, $do_deferred=false ) { @@ -2387,27 +3728,30 @@ function wp_update_term_count( $terms, $taxonomy, $do_deferred=false ) { * * @since 2.5.0 * - * @param array $terms The term_taxonomy_id of terms to update. + * @param array $terms The term_taxonomy_id of terms to update. * @param string $taxonomy The context of the term. - * @return bool Always true when complete. + * @return true Always true when complete. */ function wp_update_term_count_now( $terms, $taxonomy ) { - global $wpdb; - $terms = array_map('intval', $terms); $taxonomy = get_taxonomy($taxonomy); if ( !empty($taxonomy->update_count_callback) ) { call_user_func($taxonomy->update_count_callback, $terms, $taxonomy); } else { - // Default count updater - foreach ( (array) $terms as $term) { - $count = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $term) ); - do_action( 'edit_term_taxonomy', $term, $taxonomy ); - $wpdb->update( $wpdb->term_taxonomy, compact( 'count' ), array( 'term_taxonomy_id' => $term ) ); - do_action( 'edited_term_taxonomy', $term, $taxonomy ); + $object_types = (array) $taxonomy->object_type; + foreach ( $object_types as &$object_type ) { + if ( 0 === strpos( $object_type, 'attachment:' ) ) + list( $object_type ) = explode( ':', $object_type ); } + if ( $object_types == array_filter( $object_types, 'post_type_exists' ) ) { + // Only post types are attached to this taxonomy + _update_post_term_count( $terms, $taxonomy ); + } else { + // Default count updater + _update_generic_term_count( $terms, $taxonomy ); + } } clean_term_cache($terms, '', false); @@ -2419,52 +3763,63 @@ function wp_update_term_count_now( $terms, $taxonomy ) { // Cache // - /** * Removes the taxonomy relationship to terms from the cache. * - * Will remove the entire taxonomy relationship containing term $object_id. The - * term IDs have to exist within the taxonomy $object_type for the deletion to + * Will remove the entire taxonomy relationship containing term `$object_id`. The + * term IDs have to exist within the taxonomy `$object_type` for the deletion to * take place. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 * - * @see get_object_taxonomies() for more on $object_type - * @uses do_action() Will call action hook named, 'clean_object_term_cache' after completion. - * Passes, function params in same order. + * @see get_object_taxonomies() for more on $object_type. * - * @param int|array $object_ids Single or list of term object ID(s) - * @param array|string $object_type The taxonomy object type + * @param int|array $object_ids Single or list of term object ID(s). + * @param array|string $object_type The taxonomy object type. */ function clean_object_term_cache($object_ids, $object_type) { if ( !is_array($object_ids) ) $object_ids = array($object_ids); - foreach ( $object_ids as $id ) - foreach ( get_object_taxonomies($object_type) as $taxonomy ) + $taxonomies = get_object_taxonomies( $object_type ); + + foreach ( $object_ids as $id ) { + foreach ( $taxonomies as $taxonomy ) { wp_cache_delete($id, "{$taxonomy}_relationships"); + } + } - do_action('clean_object_term_cache', $object_ids, $object_type); + /** + * Fires after the object term cache has been cleaned. + * + * @since 2.5.0 + * + * @param array $object_ids An array of object IDs. + * @param string $objet_type Object type. + */ + do_action( 'clean_object_term_cache', $object_ids, $object_type ); } - /** * Will remove all of the term ids from the cache. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 - * @uses $wpdb * - * @param int|array $ids Single or list of Term IDs - * @param string $taxonomy Can be empty and will assume tt_ids, else will use for context. - * @param bool $clean_taxonomy Whether to clean taxonomy wide caches (true), or just individual term object caches (false). Default is true. + * @global wpdb $wpdb WordPress database abstraction object. + * @global bool $_wp_suspend_cache_invalidation + * + * @param int|array $ids Single or list of Term IDs. + * @param string $taxonomy Optional. Can be empty and will assume `tt_ids`, else will use for context. + * Default empty. + * @param bool $clean_taxonomy Optional. Whether to clean taxonomy wide caches (true), or just individual + * term object caches (false). Default true. */ function clean_term_cache($ids, $taxonomy = '', $clean_taxonomy = true) { - global $wpdb; - static $cleaned = array(); + global $wpdb, $_wp_suspend_cache_invalidation; + + if ( ! empty( $_wp_suspend_cache_invalidation ) ) { + return; + } if ( !is_array($ids) ) $ids = array($ids); @@ -2492,10 +3847,6 @@ function clean_term_cache($ids, $taxonomy = '', $clean_taxonomy = true) { } foreach ( $taxonomies as $taxonomy ) { - if ( isset($cleaned[$taxonomy]) ) - continue; - $cleaned[$taxonomy] = true; - if ( $clean_taxonomy ) { wp_cache_delete('all_ids', $taxonomy); wp_cache_delete('get', $taxonomy); @@ -2504,53 +3855,49 @@ function clean_term_cache($ids, $taxonomy = '', $clean_taxonomy = true) { _get_term_hierarchy($taxonomy); } - do_action('clean_term_cache', $ids, $taxonomy); + /** + * Fires once after each taxonomy's term cache has been cleaned. + * + * @since 2.5.0 + * + * @param array $ids An array of term IDs. + * @param string $taxonomy Taxonomy slug. + */ + do_action( 'clean_term_cache', $ids, $taxonomy ); } - wp_cache_set('last_changed', time(), 'terms'); + wp_cache_set( 'last_changed', microtime(), 'terms' ); } - /** * Retrieves the taxonomy relationship to the term object id. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 * - * @uses wp_cache_get() Retrieves taxonomy relationship from cache - * - * @param int|array $id Term object ID - * @param string $taxonomy Taxonomy Name - * @return bool|array Empty array if $terms found, but not $taxonomy. False if nothing is in cache for $taxonomy and $id. + * @param int $id Term object ID. + * @param string $taxonomy Taxonomy name. + * @return bool|mixed Empty array if $terms found, but not `$taxonomy`. False if nothing is in cache + * for `$taxonomy` and `$id`. */ -function &get_object_term_cache($id, $taxonomy) { - $cache = wp_cache_get($id, "{$taxonomy}_relationships"); - return $cache; +function get_object_term_cache( $id, $taxonomy ) { + return wp_cache_get( $id, "{$taxonomy}_relationships" ); } - /** - * Updates the cache for Term ID(s). - * - * Will only update the cache for terms not already cached. + * Updates the cache for the given term object ID(s). * - * The $object_ids expects that the ids be separated by commas, if it is a - * string. + * Note: Due to performance concerns, great care should be taken to only update + * term caches when necessary. Processing time can increase exponentially depending + * on both the number of passed term IDs and the number of taxonomies those terms + * belong to. * - * It should be noted that update_object_term_cache() is very time extensive. It - * is advised that the function is not called very often or at least not for a - * lot of terms that exist in a lot of taxonomies. The amount of time increases - * for each term and it also increases for each taxonomy the term belongs to. + * Caches will only be updated for terms not already cached. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 - * @uses wp_get_object_terms() Used to get terms from the database to update * - * @param string|array $object_ids Single or list of term object ID(s) - * @param array|string $object_type The taxonomy object type - * @return null|bool Null value is given with empty $object_ids. False if + * @param string|array $object_ids Comma-separated list or array of term object IDs. + * @param array|string $object_type The taxonomy object type. + * @return void|false False if all of the terms in `$object_ids` are already cached. */ function update_object_term_cache($object_ids, $object_type) { if ( empty($object_ids) ) @@ -2580,10 +3927,10 @@ function update_object_term_cache($object_ids, $object_type) { $object_terms = array(); foreach ( (array) $terms as $term ) - $object_terms[$term->object_id][$term->taxonomy][$term->term_id] = $term; + $object_terms[$term->object_id][$term->taxonomy][] = $term; foreach ( $ids as $id ) { - foreach ( $taxonomies as $taxonomy ) { + foreach ( $taxonomies as $taxonomy ) { if ( ! isset($object_terms[$id][$taxonomy]) ) { if ( !isset($object_terms[$id]) ) $object_terms[$id] = array(); @@ -2594,29 +3941,26 @@ function update_object_term_cache($object_ids, $object_type) { foreach ( $object_terms as $id => $value ) { foreach ( $value as $taxonomy => $terms ) { - wp_cache_set($id, $terms, "{$taxonomy}_relationships"); + wp_cache_add( $id, $terms, "{$taxonomy}_relationships" ); } } } - /** * Updates Terms to Taxonomy in cache. * - * @package WordPress - * @subpackage Taxonomy * @since 2.3.0 * - * @param array $terms List of Term objects to change - * @param string $taxonomy Optional. Update Term to this taxonomy in cache + * @param array $terms List of term objects to change. + * @param string $taxonomy Optional. Update Term to this taxonomy in cache. Default empty. */ -function update_term_cache($terms, $taxonomy = '') { +function update_term_cache( $terms, $taxonomy = '' ) { foreach ( (array) $terms as $term ) { $term_taxonomy = $taxonomy; if ( empty($term_taxonomy) ) $term_taxonomy = $term->taxonomy; - wp_cache_add($term->term_id, $term, $term_taxonomy); + wp_cache_add( $term->term_id, $term, $term_taxonomy ); } } @@ -2624,22 +3968,16 @@ function update_term_cache($terms, $taxonomy = '') { // Private // - /** * Retrieves children of taxonomy as Term IDs. * - * @package WordPress - * @subpackage Taxonomy - * @access private + * @ignore * @since 2.3.0 * - * @uses update_option() Stores all of the children in "$taxonomy_children" - * option. That is the name of the taxonomy, immediately followed by '_children'. - * - * @param string $taxonomy Taxonomy Name + * @param string $taxonomy Taxonomy name. * @return array Empty if $taxonomy isn't hierarchical or returns children as Term IDs. */ -function _get_term_hierarchy($taxonomy) { +function _get_term_hierarchy( $taxonomy ) { if ( !is_taxonomy_hierarchical($taxonomy) ) return array(); $children = get_option("{$taxonomy}_children"); @@ -2657,24 +3995,26 @@ function _get_term_hierarchy($taxonomy) { return $children; } - /** * Get the subset of $terms that are descendants of $term_id. * - * If $terms is an array of objects, then _get_term_children returns an array of objects. - * If $terms is an array of IDs, then _get_term_children returns an array of IDs. + * If `$terms` is an array of objects, then _get_term_children() returns an array of objects. + * If `$terms` is an array of IDs, then _get_term_children() returns an array of IDs. * - * @package WordPress - * @subpackage Taxonomy * @access private * @since 2.3.0 * - * @param int $term_id The ancestor term: all returned terms should be descendants of $term_id. - * @param array $terms The set of terms---either an array of term objects or term IDs---from which those that are descendants of $term_id will be chosen. - * @param string $taxonomy The taxonomy which determines the hierarchy of the terms. - * @return array The subset of $terms that are descendants of $term_id. + * @param int $term_id The ancestor term: all returned terms should be descendants of `$term_id`. + * @param array $terms The set of terms - either an array of term objects or term IDs - from which those that + * are descendants of $term_id will be chosen. + * @param string $taxonomy The taxonomy which determines the hierarchy of the terms. + * @param array $ancestors Optional. Term ancestors that have already been identified. Passed by reference, to keep + * track of found terms when recursing the hierarchy. The array of located ancestors is used + * to prevent infinite recursion loops. For performance, `term_ids` are used as array keys, + * with 1 as value. Default empty array. + * @return array|WP_Error The subset of $terms that are descendants of $term_id. */ -function &_get_term_children($term_id, $terms, $taxonomy) { +function _get_term_children( $term_id, $terms, $taxonomy, &$ancestors = array() ) { $empty_array = array(); if ( empty($terms) ) return $empty_array; @@ -2685,6 +4025,11 @@ function &_get_term_children($term_id, $terms, $taxonomy) { if ( ( 0 != $term_id ) && ! isset($has_children[$term_id]) ) return $empty_array; + // Include the term itself in the ancestors array, so we can properly detect when a loop has occurred. + if ( empty( $ancestors ) ) { + $ancestors[ $term_id ] = 1; + } + foreach ( (array) $terms as $term ) { $use_id = false; if ( !is_object($term) ) { @@ -2694,8 +4039,10 @@ function &_get_term_children($term_id, $terms, $taxonomy) { $use_id = true; } - if ( $term->term_id == $term_id ) + // Don't recurse if we've already identified the term as a child - this indicates a loop. + if ( isset( $ancestors[ $term->term_id ] ) ) { continue; + } if ( $term->parent == $term_id ) { if ( $use_id ) @@ -2706,7 +4053,9 @@ function &_get_term_children($term_id, $terms, $taxonomy) { if ( !isset($has_children[$term->term_id]) ) continue; - if ( $children = _get_term_children($term->term_id, $terms, $taxonomy) ) + $ancestors[ $term->term_id ] = 1; + + if ( $children = _get_term_children( $term->term_id, $terms, $taxonomy, $ancestors) ) $term_list = array_merge($term_list, $children); } } @@ -2714,24 +4063,21 @@ function &_get_term_children($term_id, $terms, $taxonomy) { return $term_list; } - /** * Add count of children to parent count. * * Recalculates term counts by including items from child terms. Assumes all * relevant children are already in the $terms argument. * - * @package WordPress - * @subpackage Taxonomy * @access private * @since 2.3.0 - * @uses $wpdb * - * @param array $terms List of Term IDs - * @param string $taxonomy Term Context - * @return null Will break from function if conditions are not met. + * @global wpdb $wpdb WordPress database abstraction object. + * + * @param array $terms List of term IDs, passed by reference. + * @param string $taxonomy Term context. */ -function _pad_term_counts(&$terms, $taxonomy) { +function _pad_term_counts( &$terms, $taxonomy ) { global $wpdb; // This function only works for hierarchical taxonomies like post categories. @@ -2744,13 +4090,15 @@ function _pad_term_counts(&$terms, $taxonomy) { return; $term_items = array(); + $terms_by_id = array(); + $term_ids = array(); foreach ( (array) $terms as $key => $term ) { $terms_by_id[$term->term_id] = & $terms[$key]; $term_ids[$term->term_taxonomy_id] = $term->term_id; } - // Get the object and term ids and stick them in a lookup table + // Get the object and term ids and stick them in a lookup table. $tax_obj = get_taxonomy($taxonomy); $object_types = esc_sql($tax_obj->object_type); $results = $wpdb->get_results("SELECT object_id, term_taxonomy_id FROM $wpdb->term_relationships INNER JOIN $wpdb->posts ON object_id = ID WHERE term_taxonomy_id IN (" . implode(',', array_keys($term_ids)) . ") AND post_type IN ('" . implode("', '", $object_types) . "') AND post_status = 'publish'"); @@ -2759,19 +4107,25 @@ function _pad_term_counts(&$terms, $taxonomy) { $term_items[$id][$row->object_id] = isset($term_items[$id][$row->object_id]) ? ++$term_items[$id][$row->object_id] : 1; } - // Touch every ancestor's lookup row for each post in each term + // Touch every ancestor's lookup row for each post in each term. foreach ( $term_ids as $term_id ) { $child = $term_id; - while ( $parent = $terms_by_id[$child]->parent ) { - if ( !empty($term_items[$term_id]) ) + $ancestors = array(); + while ( !empty( $terms_by_id[$child] ) && $parent = $terms_by_id[$child]->parent ) { + $ancestors[] = $child; + if ( !empty( $term_items[$term_id] ) ) foreach ( $term_items[$term_id] as $item_id => $touches ) { $term_items[$parent][$item_id] = isset($term_items[$parent][$item_id]) ? ++$term_items[$parent][$item_id]: 1; } $child = $parent; + + if ( in_array( $parent, $ancestors ) ) { + break; + } } } - // Transfer the touched cells + // Transfer the touched cells. foreach ( (array) $term_items as $id => $items ) if ( isset($terms_by_id[$id]) ) $terms_by_id[$id]->count = count($items); @@ -2787,51 +4141,459 @@ function _pad_term_counts(&$terms, $taxonomy) { * Private function for the default callback for post_tag and category * taxonomies. * - * @package WordPress - * @subpackage Taxonomy * @access private * @since 2.3.0 - * @uses $wpdb * - * @param array $terms List of Term taxonomy IDs - * @param object $taxonomy Current taxonomy object of terms + * @global wpdb $wpdb WordPress database abstraction object. + * + * @param array $terms List of Term taxonomy IDs. + * @param object $taxonomy Current taxonomy object of terms. */ function _update_post_term_count( $terms, $taxonomy ) { global $wpdb; - $object_types = is_array($taxonomy->object_type) ? $taxonomy->object_type : array($taxonomy->object_type); - $object_types = esc_sql($object_types); + $object_types = (array) $taxonomy->object_type; + + foreach ( $object_types as &$object_type ) + list( $object_type ) = explode( ':', $object_type ); + + $object_types = array_unique( $object_types ); + + if ( false !== ( $check_attachments = array_search( 'attachment', $object_types ) ) ) { + unset( $object_types[ $check_attachments ] ); + $check_attachments = true; + } + + if ( $object_types ) + $object_types = esc_sql( array_filter( $object_types, 'post_type_exists' ) ); + + foreach ( (array) $terms as $term ) { + $count = 0; + + // Attachments can be 'inherit' status, we need to base count off the parent's status if so. + if ( $check_attachments ) + $count += (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships, $wpdb->posts p1 WHERE p1.ID = $wpdb->term_relationships.object_id AND ( post_status = 'publish' OR ( post_status = 'inherit' AND post_parent > 0 AND ( SELECT post_status FROM $wpdb->posts WHERE ID = p1.post_parent ) = 'publish' ) ) AND post_type = 'attachment' AND term_taxonomy_id = %d", $term ) ); + + if ( $object_types ) + $count += (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships, $wpdb->posts WHERE $wpdb->posts.ID = $wpdb->term_relationships.object_id AND post_status = 'publish' AND post_type IN ('" . implode("', '", $object_types ) . "') AND term_taxonomy_id = %d", $term ) ); + + /** This action is documented in wp-includes/taxonomy.php */ + do_action( 'edit_term_taxonomy', $term, $taxonomy->name ); + $wpdb->update( $wpdb->term_taxonomy, compact( 'count' ), array( 'term_taxonomy_id' => $term ) ); + + /** This action is documented in wp-includes/taxonomy.php */ + do_action( 'edited_term_taxonomy', $term, $taxonomy->name ); + } +} + +/** + * Will update term count based on number of objects. + * + * Default callback for the 'link_category' taxonomy. + * + * @since 3.3.0 + * + * @global wpdb $wpdb WordPress database abstraction object. + * + * @param array $terms List of term taxonomy IDs. + * @param object $taxonomy Current taxonomy object of terms. + */ +function _update_generic_term_count( $terms, $taxonomy ) { + global $wpdb; foreach ( (array) $terms as $term ) { - $count = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships, $wpdb->posts WHERE $wpdb->posts.ID = $wpdb->term_relationships.object_id AND post_status = 'publish' AND post_type IN ('" . implode("', '", $object_types) . "') AND term_taxonomy_id = %d", $term ) ); - do_action( 'edit_term_taxonomy', $term, $taxonomy ); + $count = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $term ) ); + + /** This action is documented in wp-includes/taxonomy.php */ + do_action( 'edit_term_taxonomy', $term, $taxonomy->name ); $wpdb->update( $wpdb->term_taxonomy, compact( 'count' ), array( 'term_taxonomy_id' => $term ) ); - do_action( 'edited_term_taxonomy', $term, $taxonomy ); + + /** This action is documented in wp-includes/taxonomy.php */ + do_action( 'edited_term_taxonomy', $term, $taxonomy->name ); + } +} + +/** + * Create a new term for a term_taxonomy item that currently shares its term + * with another term_taxonomy. + * + * @ignore + * @since 4.2.0 + * @since 4.3.0 Introduced `$record` parameter. Also, `$term_id` and + * `$term_taxonomy_id` can now accept objects. + * + * @global wpdb $wpdb + * + * @param int|object $term_id ID of the shared term, or the shared term object. + * @param int|object $term_taxonomy_id ID of the term_taxonomy item to receive a new term, or the term_taxonomy object + * (corresponding to a row from the term_taxonomy table). + * @param bool $record Whether to record data about the split term in the options table. The recording + * process has the potential to be resource-intensive, so during batch operations + * it can be beneficial to skip inline recording and do it just once, after the + * batch is processed. Only set this to `false` if you know what you are doing. + * Default: true. + * @return int|WP_Error When the current term does not need to be split (or cannot be split on the current + * database schema), `$term_id` is returned. When the term is successfully split, the + * new term_id is returned. A WP_Error is returned for miscellaneous errors. + */ +function _split_shared_term( $term_id, $term_taxonomy_id, $record = true ) { + global $wpdb; + + if ( is_object( $term_id ) ) { + $shared_term = $term_id; + $term_id = intval( $shared_term->term_id ); + } + + if ( is_object( $term_taxonomy_id ) ) { + $term_taxonomy = $term_taxonomy_id; + $term_taxonomy_id = intval( $term_taxonomy->term_taxonomy_id ); + } + + // If there are no shared term_taxonomy rows, there's nothing to do here. + $shared_tt_count = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_taxonomy tt WHERE tt.term_id = %d AND tt.term_taxonomy_id != %d", $term_id, $term_taxonomy_id ) ); + + if ( ! $shared_tt_count ) { + return $term_id; + } + + /* + * Verify that the term_taxonomy_id passed to the function is actually associated with the term_id. + * If there's a mismatch, it may mean that the term is already split. Return the actual term_id from the db. + */ + $check_term_id = $wpdb->get_var( $wpdb->prepare( "SELECT term_id FROM $wpdb->term_taxonomy WHERE term_taxonomy_id = %d", $term_taxonomy_id ) ); + if ( $check_term_id != $term_id ) { + return $check_term_id; + } + + // Pull up data about the currently shared slug, which we'll use to populate the new one. + if ( empty( $shared_term ) ) { + $shared_term = $wpdb->get_row( $wpdb->prepare( "SELECT t.* FROM $wpdb->terms t WHERE t.term_id = %d", $term_id ) ); + } + + $new_term_data = array( + 'name' => $shared_term->name, + 'slug' => $shared_term->slug, + 'term_group' => $shared_term->term_group, + ); + + if ( false === $wpdb->insert( $wpdb->terms, $new_term_data ) ) { + return new WP_Error( 'db_insert_error', __( 'Could not split shared term.' ), $wpdb->last_error ); + } + + $new_term_id = (int) $wpdb->insert_id; + + // Update the existing term_taxonomy to point to the newly created term. + $wpdb->update( $wpdb->term_taxonomy, + array( 'term_id' => $new_term_id ), + array( 'term_taxonomy_id' => $term_taxonomy_id ) + ); + + // Reassign child terms to the new parent. + if ( empty( $term_taxonomy ) ) { + $term_taxonomy = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->term_taxonomy WHERE term_taxonomy_id = %d", $term_taxonomy_id ) ); + } + + $children_tt_ids = $wpdb->get_col( $wpdb->prepare( "SELECT term_taxonomy_id FROM $wpdb->term_taxonomy WHERE parent = %d AND taxonomy = %s", $term_id, $term_taxonomy->taxonomy ) ); + if ( ! empty( $children_tt_ids ) ) { + foreach ( $children_tt_ids as $child_tt_id ) { + $wpdb->update( $wpdb->term_taxonomy, + array( 'parent' => $new_term_id ), + array( 'term_taxonomy_id' => $child_tt_id ) + ); + clean_term_cache( $term_id, $term_taxonomy->taxonomy ); + } + } else { + // If the term has no children, we must force its taxonomy cache to be rebuilt separately. + clean_term_cache( $new_term_id, $term_taxonomy->taxonomy ); + } + + // Clean the cache for term taxonomies formerly shared with the current term. + $shared_term_taxonomies = $wpdb->get_row( $wpdb->prepare( "SELECT taxonomy FROM $wpdb->term_taxonomy WHERE term_id = %d", $term_id ) ); + if ( $shared_term_taxonomies ) { + foreach ( $shared_term_taxonomies as $shared_term_taxonomy ) { + clean_term_cache( $term_id, $shared_term_taxonomy ); + } + } + + // Keep a record of term_ids that have been split, keyed by old term_id. See {@see wp_get_split_term()}. + if ( $record ) { + $split_term_data = get_option( '_split_terms', array() ); + if ( ! isset( $split_term_data[ $term_id ] ) ) { + $split_term_data[ $term_id ] = array(); + } + + $split_term_data[ $term_id ][ $term_taxonomy->taxonomy ] = $new_term_id; + update_option( '_split_terms', $split_term_data ); + } + + /** + * Fires after a previously shared taxonomy term is split into two separate terms. + * + * @since 4.2.0 + * + * @param int $term_id ID of the formerly shared term. + * @param int $new_term_id ID of the new term created for the $term_taxonomy_id. + * @param int $term_taxonomy_id ID for the term_taxonomy row affected by the split. + * @param string $taxonomy Taxonomy for the split term. + */ + do_action( 'split_shared_term', $term_id, $new_term_id, $term_taxonomy_id, $term_taxonomy->taxonomy ); + + return $new_term_id; +} + +/** + * Splits a batch of shared taxonomy terms. + * + * @since 4.3.0 + * + * @global wpdb $wpdb WordPress database abstraction object. + */ +function _wp_batch_split_terms() { + global $wpdb; + + $lock_name = 'term_split.lock'; + + // Try to lock. + $lock_result = $wpdb->query( $wpdb->prepare( "INSERT IGNORE INTO `$wpdb->options` ( `option_name`, `option_value`, `autoload` ) VALUES (%s, %s, 'no') /* LOCK */", $lock_name, time() ) ); + + if ( ! $lock_result ) { + $lock_result = get_option( $lock_name ); + + // Bail if we were unable to create a lock, or if the existing lock is still valid. + if ( ! $lock_result || ( $lock_result > ( time() - HOUR_IN_SECONDS ) ) ) { + wp_schedule_single_event( time() + ( 5 * MINUTE_IN_SECONDS ), 'wp_split_shared_term_batch' ); + return; + } + } + + // Update the lock, as by this point we've definitely got a lock, just need to fire the actions. + update_option( $lock_name, time() ); + + // Get a list of shared terms (those with more than one associated row in term_taxonomy). + $shared_terms = $wpdb->get_results( + "SELECT tt.term_id, t.*, count(*) as term_tt_count FROM {$wpdb->term_taxonomy} tt + LEFT JOIN {$wpdb->terms} t ON t.term_id = tt.term_id + GROUP BY t.term_id + HAVING term_tt_count > 1 + LIMIT 10" + ); + + // No more terms, we're done here. + if ( ! $shared_terms ) { + update_option( 'finished_splitting_shared_terms', true ); + delete_option( $lock_name ); + return; + } + + // Shared terms found? We'll need to run this script again. + wp_schedule_single_event( time() + ( 2 * MINUTE_IN_SECONDS ), 'wp_split_shared_term_batch' ); + + // Rekey shared term array for faster lookups. + $_shared_terms = array(); + foreach ( $shared_terms as $shared_term ) { + $term_id = intval( $shared_term->term_id ); + $_shared_terms[ $term_id ] = $shared_term; + } + $shared_terms = $_shared_terms; + + // Get term taxonomy data for all shared terms. + $shared_term_ids = implode( ',', array_keys( $shared_terms ) ); + $shared_tts = $wpdb->get_results( "SELECT * FROM {$wpdb->term_taxonomy} WHERE `term_id` IN ({$shared_term_ids})" ); + + // Split term data recording is slow, so we do it just once, outside the loop. + $split_term_data = get_option( '_split_terms', array() ); + $skipped_first_term = $taxonomies = array(); + foreach ( $shared_tts as $shared_tt ) { + $term_id = intval( $shared_tt->term_id ); + + // Don't split the first tt belonging to a given term_id. + if ( ! isset( $skipped_first_term[ $term_id ] ) ) { + $skipped_first_term[ $term_id ] = 1; + continue; + } + + if ( ! isset( $split_term_data[ $term_id ] ) ) { + $split_term_data[ $term_id ] = array(); + } + + // Keep track of taxonomies whose hierarchies need flushing. + if ( ! isset( $taxonomies[ $shared_tt->taxonomy ] ) ) { + $taxonomies[ $shared_tt->taxonomy ] = 1; + } + + // Split the term. + $split_term_data[ $term_id ][ $shared_tt->taxonomy ] = _split_shared_term( $shared_terms[ $term_id ], $shared_tt, false ); + } + + // Rebuild the cached hierarchy for each affected taxonomy. + foreach ( array_keys( $taxonomies ) as $tax ) { + delete_option( "{$tax}_children" ); + _get_term_hierarchy( $tax ); + } + + update_option( '_split_terms', $split_term_data ); + + delete_option( $lock_name ); +} + +/** + * In order to avoid the _wp_batch_split_terms() job being accidentally removed, + * check that it's still scheduled while we haven't finished splitting terms. + * + * @ignore + * @since 4.3.0 + */ +function _wp_check_for_scheduled_split_terms() { + if ( ! get_option( 'finished_splitting_shared_terms' ) && ! wp_next_scheduled( 'wp_split_shared_term_batch' ) ) { + wp_schedule_single_event( time() + MINUTE_IN_SECONDS, 'wp_split_shared_term_batch' ); + } +} + +/** + * Check default categories when a term gets split to see if any of them need to be updated. + * + * @ignore + * @since 4.2.0 + * + * @param int $term_id ID of the formerly shared term. + * @param int $new_term_id ID of the new term created for the $term_taxonomy_id. + * @param int $term_taxonomy_id ID for the term_taxonomy row affected by the split. + * @param string $taxonomy Taxonomy for the split term. + */ +function _wp_check_split_default_terms( $term_id, $new_term_id, $term_taxonomy_id, $taxonomy ) { + if ( 'category' != $taxonomy ) { + return; + } + + foreach ( array( 'default_category', 'default_link_category', 'default_email_category' ) as $option ) { + if ( $term_id == get_option( $option, -1 ) ) { + update_option( $option, $new_term_id ); + } + } +} + +/** + * Check menu items when a term gets split to see if any of them need to be updated. + * + * @ignore + * @since 4.2.0 + * + * @global wpdb $wpdb + * + * @param int $term_id ID of the formerly shared term. + * @param int $new_term_id ID of the new term created for the $term_taxonomy_id. + * @param int $term_taxonomy_id ID for the term_taxonomy row affected by the split. + * @param string $taxonomy Taxonomy for the split term. + */ +function _wp_check_split_terms_in_menus( $term_id, $new_term_id, $term_taxonomy_id, $taxonomy ) { + global $wpdb; + $post_ids = $wpdb->get_col( $wpdb->prepare( + "SELECT m1.post_id + FROM {$wpdb->postmeta} AS m1 + INNER JOIN {$wpdb->postmeta} AS m2 ON ( m2.post_id = m1.post_id ) + INNER JOIN {$wpdb->postmeta} AS m3 ON ( m3.post_id = m1.post_id ) + WHERE ( m1.meta_key = '_menu_item_type' AND m1.meta_value = 'taxonomy' ) + AND ( m2.meta_key = '_menu_item_object' AND m2.meta_value = '%s' ) + AND ( m3.meta_key = '_menu_item_object_id' AND m3.meta_value = %d )", + $taxonomy, + $term_id + ) ); + + if ( $post_ids ) { + foreach ( $post_ids as $post_id ) { + update_post_meta( $post_id, '_menu_item_object_id', $new_term_id, $term_id ); + } + } +} + +/** + * If the term being split is a nav_menu, change associations. + * + * @ignore + * @since 4.3.0 + * + * @global wpdb $wpdb + * + * @param int $term_id ID of the formerly shared term. + * @param int $new_term_id ID of the new term created for the $term_taxonomy_id. + * @param int $term_taxonomy_id ID for the term_taxonomy row affected by the split. + * @param string $taxonomy Taxonomy for the split term. + */ +function _wp_check_split_nav_menu_terms( $term_id, $new_term_id, $term_taxonomy_id, $taxonomy ) { + if ( 'nav_menu' !== $taxonomy ) { + return; + } + + // Update menu locations. + $locations = get_nav_menu_locations(); + foreach ( $locations as $location => $menu_id ) { + if ( $term_id == $menu_id ) { + $locations[ $location ] = $new_term_id; + } + } + set_theme_mod( 'nav_menu_locations', $locations ); +} + +/** + * Get data about terms that previously shared a single term_id, but have since been split. + * + * @since 4.2.0 + * + * @param int $old_term_id Term ID. This is the old, pre-split term ID. + * @return array Array of new term IDs, keyed by taxonomy. + */ +function wp_get_split_terms( $old_term_id ) { + $split_terms = get_option( '_split_terms', array() ); + + $terms = array(); + if ( isset( $split_terms[ $old_term_id ] ) ) { + $terms = $split_terms[ $old_term_id ]; } + + return $terms; } +/** + * Get the new term ID corresponding to a previously split term. + * + * @since 4.2.0 + * + * @param int $old_term_id Term ID. This is the old, pre-split term ID. + * @param string $taxonomy Taxonomy that the term belongs to. + * @return int|false If a previously split term is found corresponding to the old term_id and taxonomy, + * the new term_id will be returned. If no previously split term is found matching + * the parameters, returns false. + */ +function wp_get_split_term( $old_term_id, $taxonomy ) { + $split_terms = wp_get_split_terms( $old_term_id ); + + $term_id = false; + if ( isset( $split_terms[ $taxonomy ] ) ) { + $term_id = (int) $split_terms[ $taxonomy ]; + } + + return $term_id; +} /** - * Generates a permalink for a taxonomy term archive. + * Generate a permalink for a taxonomy term archive. * * @since 2.5.0 * - * @uses apply_filters() Calls 'term_link' with term link and term object, and taxonomy parameters. - * @uses apply_filters() For the post_tag Taxonomy, Calls 'tag_link' with tag link and tag ID as parameters. - * @uses apply_filters() For the category Taxonomy, Calls 'category_link' filter on category link and category ID. + * @global WP_Rewrite $wp_rewrite * - * @param object|int|string $term - * @param string $taxonomy (optional if $term is object) + * @param object|int|string $term The term object, ID, or slug whose link will be retrieved. + * @param string $taxonomy Optional. Taxonomy. Default empty. * @return string|WP_Error HTML link to taxonomy term archive on success, WP_Error if term does not exist. */ -function get_term_link( $term, $taxonomy = '') { +function get_term_link( $term, $taxonomy = '' ) { global $wp_rewrite; if ( !is_object($term) ) { - if ( is_int($term) ) { - $term = &get_term($term, $taxonomy); + if ( is_int( $term ) ) { + $term = get_term( $term, $taxonomy ); } else { - $term = &get_term_by('slug', $term, $taxonomy); + $term = get_term_by( 'slug', $term, $taxonomy ); } } @@ -2859,7 +4621,7 @@ function get_term_link( $term, $taxonomy = '') { } else { if ( $t->rewrite['hierarchical'] ) { $hierarchical_slugs = array(); - $ancestors = get_ancestors($term->term_id, $taxonomy); + $ancestors = get_ancestors( $term->term_id, $taxonomy, 'taxonomy' ); foreach ( (array)$ancestors as $ancestor ) { $ancestor_term = get_term($ancestor, $taxonomy); $hierarchical_slugs[] = $ancestor_term->slug; @@ -2873,12 +4635,42 @@ function get_term_link( $term, $taxonomy = '') { $termlink = home_url( user_trailingslashit($termlink, 'category') ); } // Back Compat filters. - if ( 'post_tag' == $taxonomy ) + if ( 'post_tag' == $taxonomy ) { + + /** + * Filter the tag link. + * + * @since 2.3.0 + * @deprecated 2.5.0 Use 'term_link' instead. + * + * @param string $termlink Tag link URL. + * @param int $term_id Term ID. + */ $termlink = apply_filters( 'tag_link', $termlink, $term->term_id ); - elseif ( 'category' == $taxonomy ) + } elseif ( 'category' == $taxonomy ) { + + /** + * Filter the category link. + * + * @since 1.5.0 + * @deprecated 2.5.0 Use 'term_link' instead. + * + * @param string $termlink Category link URL. + * @param int $term_id Term ID. + */ $termlink = apply_filters( 'category_link', $termlink, $term->term_id ); + } - return apply_filters('term_link', $termlink, $term, $taxonomy); + /** + * Filter the term link. + * + * @since 2.5.0 + * + * @param string $termlink Term link URL. + * @param object $term Term object. + * @param string $taxonomy Taxonomy slug. + */ + return apply_filters( 'term_link', $termlink, $term, $taxonomy ); } /** @@ -2888,31 +4680,30 @@ function get_term_link( $term, $taxonomy = '') { * post without specifying the Post ID. You can also use it outside the Loop to * display the taxonomies for a specific post. * - * The available defaults are: - * 'post' : default is 0. The post ID to get taxonomies of. - * 'before' : default is empty string. Display before taxonomies list. - * 'sep' : default is empty string. Separate every taxonomy with value in this. - * 'after' : default is empty string. Display this after the taxonomies list. - * 'template' : The template to use for displaying the taxonomy terms. - * * @since 2.5.0 - * @uses get_the_taxonomies() * - * @param array $args Override the defaults. + * @param array $args { + * Arguments about which post to use and how to format the output. Shares all of the arguments + * supported by get_the_taxonomies(), in addition to the following. + * + * @type int|WP_Post $post Post ID or object to get taxonomies of. Default current post. + * @type string $before Displays before the taxonomies. Default empty string. + * @type string $sep Separates each taxonomy. Default is a space. + * @type string $after Displays after the taxonomies. Default empty string. + * } + * @param array $args See {@link get_the_taxonomies()} for a description of arguments and their defaults. */ -function the_taxonomies($args = array()) { +function the_taxonomies( $args = array() ) { $defaults = array( 'post' => 0, 'before' => '', 'sep' => ' ', 'after' => '', - 'template' => '%s: %l.' ); $r = wp_parse_args( $args, $defaults ); - extract( $r, EXTR_SKIP ); - echo $before . join($sep, get_the_taxonomies($post, $r)) . $after; + echo $r['before'] . join( $r['sep'], get_the_taxonomies( $r['post'], $r ) ) . $r['after']; } /** @@ -2923,46 +4714,59 @@ function the_taxonomies($args = array()) { * * @since 2.5.0 * - * @param int $post Optional. Post ID or will use Global Post ID (in loop). - * @param array $args Override the defaults. - * @return array + * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post. + * @param array $args { + * Optional. Arguments about how to format the list of taxonomies. Default empty array. + * + * @type string $template Template for displaying a taxonomy label and list of terms. + * Default is "Label: Terms." + * @type string $term_template Template for displaying a single term in the list. Default is the term name + * linked to its archive. + * } + * @return array List of taxonomies. */ -function get_the_taxonomies($post = 0, $args = array() ) { - if ( is_int($post) ) - $post =& get_post($post); - elseif ( !is_object($post) ) - $post =& $GLOBALS['post']; +function get_the_taxonomies( $post = 0, $args = array() ) { + $post = get_post( $post ); $args = wp_parse_args( $args, array( - 'template' => '%s: %l.', + /* translators: %s: taxonomy label, %l: list of terms formatted as per $term_template */ + 'template' => __( '%s: %l.' ), + 'term_template' => '%2$s', ) ); - extract( $args, EXTR_SKIP ); $taxonomies = array(); - if ( !$post ) + if ( ! $post ) { return $taxonomies; + } - foreach ( get_object_taxonomies($post) as $taxonomy ) { - $t = (array) get_taxonomy($taxonomy); - if ( empty($t['label']) ) + foreach ( get_object_taxonomies( $post ) as $taxonomy ) { + $t = (array) get_taxonomy( $taxonomy ); + if ( empty( $t['label'] ) ) { $t['label'] = $taxonomy; - if ( empty($t['args']) ) + } + if ( empty( $t['args'] ) ) { $t['args'] = array(); - if ( empty($t['template']) ) - $t['template'] = $template; - - $terms = get_object_term_cache($post->ID, $taxonomy); - if ( empty($terms) ) - $terms = wp_get_object_terms($post->ID, $taxonomy, $t['args']); + } + if ( empty( $t['template'] ) ) { + $t['template'] = $args['template']; + } + if ( empty( $t['term_template'] ) ) { + $t['term_template'] = $args['term_template']; + } + $terms = get_object_term_cache( $post->ID, $taxonomy ); + if ( false === $terms ) { + $terms = wp_get_object_terms( $post->ID, $taxonomy, $t['args'] ); + } $links = array(); - foreach ( $terms as $term ) - $links[] = "$term->name"; - - if ( $links ) - $taxonomies[$taxonomy] = wp_sprintf($t['template'], $t['label'], $links, $terms); + foreach ( $terms as $term ) { + $links[] = wp_sprintf( $t['term_template'], esc_attr( get_term_link( $term ) ), $term->name ); + } + if ( $links ) { + $taxonomies[$taxonomy] = wp_sprintf( $t['template'], $t['label'], $links, $terms ); + } } return $taxonomies; } @@ -2971,13 +4775,12 @@ function get_the_taxonomies($post = 0, $args = array() ) { * Retrieve all taxonomies of a post with just the names. * * @since 2.5.0 - * @uses get_object_taxonomies() * - * @param int $post Optional. Post ID + * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post. * @return array */ -function get_post_taxonomies($post = 0) { - $post =& get_post($post); +function get_post_taxonomies( $post = 0 ) { + $post = get_post( $post ); return get_object_taxonomies($post); } @@ -2990,20 +4793,18 @@ function get_post_taxonomies($post = 0) { * If no terms are given, determines if object is associated with any terms in the given taxonomy. * * @since 2.7.0 - * @uses get_object_term_cache() - * @uses wp_get_object_terms() * - * @param int $object_id ID of the object (post ID, link ID, ...) - * @param string $taxonomy Single taxonomy name - * @param int|string|array $terms Optional. Term term_id, name, slug or array of said - * @return bool|WP_Error. WP_Error on input error. + * @param int $object_id ID of the object (post ID, link ID, ...). + * @param string $taxonomy Single taxonomy name. + * @param int|string|array $terms Optional. Term term_id, name, slug or array of said. Default null. + * @return bool|WP_Error WP_Error on input error. */ function is_object_in_term( $object_id, $taxonomy, $terms = null ) { if ( !$object_id = (int) $object_id ) return new WP_Error( 'invalid_object', __( 'Invalid object ID' ) ); $object_terms = get_object_term_cache( $object_id, $taxonomy ); - if ( empty( $object_terms ) ) + if ( false === $object_terms ) $object_terms = wp_get_object_terms( $object_id, $taxonomy ); if ( is_wp_error( $object_terms ) ) @@ -3021,11 +4822,20 @@ function is_object_in_term( $object_id, $taxonomy, $terms = null ) { $strs =& $terms; foreach ( $object_terms as $object_term ) { - if ( $ints && in_array( $object_term->term_id, $ints ) ) return true; // If int, check against term_id + // If term is an int, check against term_ids only. + if ( $ints && in_array( $object_term->term_id, $ints ) ) { + return true; + } + if ( $strs ) { - if ( in_array( $object_term->term_id, $strs ) ) return true; - if ( in_array( $object_term->name, $strs ) ) return true; - if ( in_array( $object_term->slug, $strs ) ) return true; + // Only check numeric strings against term_id, to avoid false matches due to type juggling. + $numeric_strs = array_map( 'intval', array_filter( $strs, 'is_numeric' ) ); + if ( in_array( $object_term->term_id, $numeric_strs, true ) ) { + return true; + } + + if ( in_array( $object_term->name, $strs ) ) return true; + if ( in_array( $object_term->slug, $strs ) ) return true; } } @@ -3036,75 +4846,89 @@ function is_object_in_term( $object_id, $taxonomy, $terms = null ) { * Determine if the given object type is associated with the given taxonomy. * * @since 3.0.0 - * @uses get_object_taxonomies() * - * @param string $object_type Object type string - * @param string $taxonomy Single taxonomy name + * @param string $object_type Object type string. + * @param string $taxonomy Single taxonomy name. * @return bool True if object is associated with the taxonomy, otherwise false. */ -function is_object_in_taxonomy($object_type, $taxonomy) { - $taxonomies = get_object_taxonomies($object_type); - - if ( empty($taxonomies) ) +function is_object_in_taxonomy( $object_type, $taxonomy ) { + $taxonomies = get_object_taxonomies( $object_type ); + if ( empty( $taxonomies ) ) { return false; - - if ( in_array($taxonomy, $taxonomies) ) - return true; - - return false; + } + return in_array( $taxonomy, $taxonomies ); } /** * Get an array of ancestor IDs for a given object. * - * @param int $object_id The ID of the object - * @param string $object_type The type of object for which we'll be retrieving ancestors. - * @return array of ancestors from lowest to highest in the hierarchy. + * @since 3.1.0 + * @since 4.1.0 Introduced the `$resource_type` argument. + * + * @param int $object_id Optional. The ID of the object. Default 0. + * @param string $object_type Optional. The type of object for which we'll be retrieving + * ancestors. Accepts a post type or a taxonomy name. Default empty. + * @param string $resource_type Optional. Type of resource $object_type is. Accepts 'post_type' + * or 'taxonomy'. Default empty. + * @return array An array of ancestors from lowest to highest in the hierarchy. */ -function get_ancestors($object_id = 0, $object_type = '') { +function get_ancestors( $object_id = 0, $object_type = '', $resource_type = '' ) { $object_id = (int) $object_id; $ancestors = array(); if ( empty( $object_id ) ) { - return apply_filters('get_ancestors', $ancestors, $object_id, $object_type); + + /** This filter is documented in wp-includes/taxonomy.php */ + return apply_filters( 'get_ancestors', $ancestors, $object_id, $object_type, $resource_type ); + } + + if ( ! $resource_type ) { + if ( is_taxonomy_hierarchical( $object_type ) ) { + $resource_type = 'taxonomy'; + } elseif ( post_type_exists( $object_type ) ) { + $resource_type = 'post_type'; + } } - if ( is_taxonomy_hierarchical( $object_type ) ) { + if ( 'taxonomy' === $resource_type ) { $term = get_term($object_id, $object_type); while ( ! is_wp_error($term) && ! empty( $term->parent ) && ! in_array( $term->parent, $ancestors ) ) { $ancestors[] = (int) $term->parent; $term = get_term($term->parent, $object_type); } - } elseif ( null !== get_post_type_object( $object_type ) ) { - $object = get_post($object_id); - if ( ! is_wp_error( $object ) && isset( $object->ancestors ) && is_array( $object->ancestors ) ) - $ancestors = $object->ancestors; - else { - while ( ! is_wp_error($object) && ! empty( $object->post_parent ) && ! in_array( $object->post_parent, $ancestors ) ) { - $ancestors[] = (int) $object->post_parent; - $object = get_post($object->post_parent); - } - } + } elseif ( 'post_type' === $resource_type ) { + $ancestors = get_post_ancestors($object_id); } - return apply_filters('get_ancestors', $ancestors, $object_id, $object_type); + /** + * Filter a given object's ancestors. + * + * @since 3.1.0 + * @since 4.1.1 Introduced the `$resource_type` parameter. + * + * @param array $ancestors An array of object ancestors. + * @param int $object_id Object ID. + * @param string $object_type Type of object. + * @param string $resource_type Type of resource $object_type is. + */ + return apply_filters( 'get_ancestors', $ancestors, $object_id, $object_type, $resource_type ); } /** - * Returns the term's parent's term_ID + * Returns the term's parent's term_ID. * * @since 3.1.0 * - * @param int $term_id - * @param string $taxonomy - * - * @return int|bool false on error + * @param int $term_id Term ID. + * @param string $taxonomy Taxonomy name. + * @return int|false False on error. */ function wp_get_term_taxonomy_parent_id( $term_id, $taxonomy ) { $term = get_term( $term_id, $taxonomy ); - if ( !$term || is_wp_error( $term ) ) + if ( ! $term || is_wp_error( $term ) ) { return false; + } return (int) $term->parent; } @@ -3112,13 +4936,12 @@ function wp_get_term_taxonomy_parent_id( $term_id, $taxonomy ) { * Checks the given subset of the term hierarchy for hierarchy loops. * Prevents loops from forming and breaks those that it finds. * - * Attached to the wp_update_term_parent filter. + * Attached to the {@see 'wp_update_term_parent'} filter. * * @since 3.1.0 - * @uses wp_find_hierarchy_loop() * - * @param int $parent term_id of the parent for the term we're checking. - * @param int $term_id The term we're checking. + * @param int $parent `term_id` of the parent for the term we're checking. + * @param int $term_id The term we're checking. * @param string $taxonomy The taxonomy of the term we're checking. * * @return int The new parent for the term. @@ -3128,20 +4951,19 @@ function wp_check_term_hierarchy_for_loops( $parent, $term_id, $taxonomy ) { if ( !$parent ) return 0; - // Can't be its own parent + // Can't be its own parent. if ( $parent == $term_id ) return 0; - // Now look for larger loops - + // Now look for larger loops. if ( !$loop = wp_find_hierarchy_loop( 'wp_get_term_taxonomy_parent_id', $term_id, $parent, array( $taxonomy ) ) ) return $parent; // No loop - // Setting $parent to the given value causes a loop + // Setting $parent to the given value causes a loop. if ( isset( $loop[$term_id] ) ) return 0; - // There's a loop, but it doesn't contain $term_id. Break the loop. + // There's a loop, but it doesn't contain $term_id. Break the loop. foreach ( array_keys( $loop ) as $loop_member ) wp_update_term( $loop_member, $taxonomy, array( 'parent' => 0 ) );