X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/177fd6fefd2e3d5a0ea6591c71d660cabdb3c1a4..refs/tags/wordpress-4.6.1:/wp-includes/taxonomy.php diff --git a/wp-includes/taxonomy.php b/wp-includes/taxonomy.php index 2407e14e..70af35a3 100644 --- a/wp-includes/taxonomy.php +++ b/wp-includes/taxonomy.php @@ -1,8 +1,9 @@ 'category', 'object_type' => 'post', 'hierarchical' => true, 'update_count_callback' => '_update_post_term_count'); -$wp_taxonomies['post_tag'] = (object) array('name' => 'post_tag', 'object_type' => 'post', 'hierarchical' => false, 'update_count_callback' => '_update_post_term_count'); -$wp_taxonomies['link_category'] = (object) array('name' => 'link_category', 'object_type' => 'link', 'hierarchical' => false); +function create_initial_taxonomies() { + global $wp_rewrite; + + if ( ! did_action( 'init' ) ) { + $rewrite = array( 'category' => false, 'post_tag' => false, 'post_format' => false ); + } else { + + /** + * Filters 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, + 'query_var' => 'category_name', + 'rewrite' => $rewrite['category'], + 'public' => true, + 'show_ui' => true, + 'show_admin_column' => true, + '_builtin' => true, + ) ); + + register_taxonomy( 'post_tag', 'post', array( + 'hierarchical' => false, + 'query_var' => 'tag', + 'rewrite' => $rewrite['post_tag'], + 'public' => true, + 'show_ui' => true, + 'show_admin_column' => true, + '_builtin' => true, + ) ); + + register_taxonomy( 'nav_menu', 'nav_menu_item', array( + 'public' => false, + 'hierarchical' => false, + 'labels' => array( + 'name' => __( 'Navigation Menus' ), + 'singular_name' => __( 'Navigation Menu' ), + ), + 'query_var' => false, + 'rewrite' => false, + 'show_ui' => false, + '_builtin' => true, + 'show_in_nav_menus' => false, + ) ); + + register_taxonomy( 'link_category', 'link', array( + 'hierarchical' => false, + 'labels' => array( + 'name' => __( 'Link Categories' ), + 'singular_name' => __( 'Link Category' ), + 'search_items' => __( 'Search Link Categories' ), + 'popular_items' => null, + 'all_items' => __( 'All Link Categories' ), + 'edit_item' => __( 'Edit Link Category' ), + 'update_item' => __( 'Update Link Category' ), + 'add_new_item' => __( 'Add New Link Category' ), + 'new_item_name' => __( 'New Link Category Name' ), + 'separate_items_with_commas' => null, + '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, + 'show_ui' => true, + '_builtin' => true, + ) ); + + register_taxonomy( 'post_format', 'post', array( + 'public' => true, + 'hierarchical' => false, + 'labels' => array( + 'name' => _x( 'Format', 'post format' ), + 'singular_name' => _x( 'Format', 'post format' ), + ), + 'query_var' => true, + 'rewrite' => $rewrite['post_format'], + 'show_ui' => false, + '_builtin' => true, + 'show_in_nav_menus' => current_theme_supports( 'post-formats' ), + ) ); +} /** - * get_object_taxonomies() - Return all of the taxonomy names that are of $object_type + * Retrieves a list of registered taxonomy names or objects. * - * It appears that this function can be used to find all of the names inside of - * $wp_taxonomies global variable. + * @since 3.0.0 * - * - * Should result in Array('category', 'post_tag') + * @global array $wp_taxonomies The registered taxonomies. * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 + * @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; + + $field = ('names' == $output) ? 'name' : false; + + return wp_filter_object_list($wp_taxonomies, $args, $operator, $field); +} + +/** + * Return the names or objects of the taxonomies which are registered for the requested object or object type, such as + * a post object or post type name. + * + * Example: + * + * $taxonomies = get_object_taxonomies( 'post' ); + * + * This results in: + * + * Array( 'category', 'post_tag' ) * - * @uses $wp_taxonomies + * @since 2.3.0 * - * @param array|string|object $object Name of the type of taxonomy object, or an object (row from posts) + * @global array $wp_taxonomies The registered taxonomies. + * + * @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) { +function get_object_taxonomies( $object, $output = 'names' ) { global $wp_taxonomies; if ( is_object($object) ) { @@ -49,77 +188,73 @@ function get_object_taxonomies($object) { $object = (array) $object; $taxonomies = array(); - foreach ( $wp_taxonomies as $taxonomy ) { - if ( array_intersect($object, (array) $taxonomy->object_type) ) - $taxonomies[] = $taxonomy->name; + foreach ( (array) $wp_taxonomies as $tax_name => $tax_obj ) { + if ( array_intersect($object, (array) $tax_obj->object_type) ) { + if ( 'names' == $output ) + $taxonomies[] = $tax_name; + else + $taxonomies[ $tax_name ] = $tax_obj; + } } return $taxonomies; } /** - * get_taxonomy() - Returns the taxonomy object of $taxonomy. + * Retrieves the taxonomy object of $taxonomy. * * 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 + * @since 2.3.0 * - * @uses $wp_taxonomies - * @uses is_taxonomy() 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 $wp_taxonomies; - if ( ! is_taxonomy($taxonomy) ) + if ( ! taxonomy_exists( $taxonomy ) ) return false; return $wp_taxonomies[$taxonomy]; } /** - * is_taxonomy() - Checks that the taxonomy name exists + * Checks that the taxonomy name exists. * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 + * Formerly is_taxonomy(), introduced in 2.3.0. + * + * @since 3.0.0 * - * @uses $wp_taxonomies + * @global array $wp_taxonomies The registered taxonomies. * - * @param string $taxonomy Name of taxonomy object - * @return bool Whether the taxonomy exists or not. + * @param string $taxonomy Name of taxonomy object. + * @return bool Whether the taxonomy exists. */ -function is_taxonomy( $taxonomy ) { +function taxonomy_exists( $taxonomy ) { global $wp_taxonomies; - return isset($wp_taxonomies[$taxonomy]); + return isset( $wp_taxonomies[$taxonomy] ); } /** - * is_taxonomy_hierarchical() - Whether the taxonomy object is hierarchical + * Whether the taxonomy object is hierarchical. * - * Checks to make sure that the taxonomy is an object first. Then Gets the object, and finally - * returns the hierarchical value in the object. + * Checks to make sure that the taxonomy is an object first. Then Gets the + * object, and finally returns the hierarchical value in the object. * * A false return value might also mean that the taxonomy does not exist. * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 + * @since 2.3.0 * - * @uses is_taxonomy() 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 ( ! is_taxonomy($taxonomy) ) + if ( ! taxonomy_exists($taxonomy) ) return false; $taxonomy = get_taxonomy($taxonomy); @@ -127,56 +262,438 @@ function is_taxonomy_hierarchical($taxonomy) { } /** - * register_taxonomy() - Create or modify a taxonomy object. Do not use before init. + * Creates or modifies a taxonomy object. * - * A simple function for creating or modifying a taxonomy object based on the parameters given. - * The function will accept an array (third optional parameter), along with strings for the - * taxonomy name and another string for the object type. + * Note: Do not use before the {@see 'init'} hook. * - * Nothing is returned, so expect error maybe or use is_taxonomy() to check whether taxonomy exists. + * A simple function for creating or modifying a taxonomy object based on the + * parameters given. The function will accept an array (third optional + * parameter), along with strings for the taxonomy name and another string for + * the object type. * - * Optional $args contents: - * hierarachical - has some defined purpose at other parts of the API and is a boolean value. - * update_count_callback - works much like a hook, in that it will be called when the count is updated. - * rewrite - false to prevent rewrite, or array('slug'=>$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 + * @since 2.3.0 + * @since 4.2.0 Introduced `show_in_quick_edit` argument. + * @since 4.4.0 The `show_ui` argument is now enforced on the term editing screen. + * @since 4.4.0 The `public` argument now controls whether the taxonomy can be queried on the front end. + * @since 4.5.0 Introduced `publicly_queryable` argument. * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 - * @uses $wp_taxonomies Inserts new taxonomy object into the list - * @uses $wp_rewrite Adds rewrite tags and permastructs - * @uses $wp Adds query vars + * @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 { + * Optional. Array or query string of arguments for registering a taxonomy. + * + * @type string $label Name of the taxonomy shown in the menu. Usually plural. If not set, + * `$labels['name']` will be used. + * @type array $labels An array of labels for this taxonomy. By default, Tag labels are used for + * non-hierarchical taxonmies, and Category labels are used for hierarchical + * taxonomies. See accepted values in get_taxonomy_labels(). + * Default empty array. + * @type string $description A short descriptive summary of what the taxonomy is for. Default empty. + * @type bool $public Whether a taxonomy is intended for use publicly either via + * the admin interface or by front-end users. The default settings + * of `$publicly_queryable`, `$show_ui`, and `$show_in_nav_menus` + * are inherited from `$public`. + * @type bool $publicly_queryable Whether the taxonomy is publicly queryable. + * If not set, the default is inherited from `$public` + * @type bool $hierarchical Whether the taxonomy is hierarchical. Default false. + * @type bool $show_ui Whether to generate and allow a UI for managing terms in this taxonomy in + * the admin. If not set, the default is inherited from `$public` + * (default true). + * @type bool $show_in_menu Whether to show the taxonomy in the admin menu. If true, the taxonomy is + * shown as a submenu of the object type menu. If false, no menu is shown. + * `$show_ui` must be true. If not set, default is inherited from `$show_ui` + * (default true). + * @type bool $show_in_nav_menus Makes this taxonomy available for selection in navigation menus. If not + * set, the default is inherited from `$public` (default true). + * @type bool $show_tagcloud Whether to list the taxonomy in the Tag Cloud Widget controls. If not set, + * the default is inherited from `$show_ui` (default true). + * @type bool $show_in_quick_edit Whether to show the taxonomy in the quick/bulk edit panel. It not set, + * the default is inherited from `$show_ui` (default true). + * @type bool $show_admin_column Whether to display a column for the taxonomy on its post type listing + * screens. Default false. + * @type bool|callable $meta_box_cb Provide a callback function for the meta box display. If not set, + * post_categories_meta_box() is used for hierarchical taxonomies, and + * post_tags_meta_box() is used for non-hierarchical. If false, no meta + * box is shown. + * @type array $capabilities { + * Array of capabilities for this taxonomy. + * + * @type string $manage_terms Default 'manage_categories'. + * @type string $edit_terms Default 'manage_categories'. + * @type string $delete_terms Default 'manage_categories'. + * @type string $assign_terms Default 'edit_posts'. + * } + * @type bool|array $rewrite { + * Triggers the handling of rewrites for this taxonomy. Default 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: + * + * @type string $slug Customize the permastruct slug. Default `$taxonomy` key. + * @type bool $with_front Should the permastruct be prepended with WP_Rewrite::$front. Default true. + * @type bool $hierarchical Either hierarchical rewrite tag or not. Default false. + * @type int $ep_mask Assign an endpoint mask. Default `EP_NONE`. + * } + * @type string $query_var Sets the query var key for this taxonomy. Default `$taxonomy` key. If + * false, a taxonomy cannot be loaded at `?{query_var}={term_slug}`. If a + * string, the query `?{query_var}={term_slug}` will be valid. + * @type callable $update_count_callback Works much like a hook, in that it will be called when the count is + * updated. Default _update_post_term_count() for taxonomies attached + * to post types, which confirms that the objects are published before + * counting them. Default _update_generic_term_count() for taxonomies + * attached to other object types, such as users. + * @type bool $_builtin This taxonomy is a "built-in" taxonomy. INTERNAL USE ONLY! + * Default false. + * } + * @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; - $defaults = array('hierarchical' => false, 'update_count_callback' => '', 'rewrite' => true, 'query_var' => true); - $args = wp_parse_args($args, $defaults); + if ( ! is_array( $wp_taxonomies ) ) + $wp_taxonomies = array(); + + $args = wp_parse_args( $args ); + + /** + * Filters the arguments for registering a taxonomy. + * + * @since 4.4.0 + * + * @param array $args Array of arguments for registering a taxonomy. + * @param string $taxonomy Taxonomy key. + * @param array $object_type Array of names of object types for the taxonomy. + */ + $args = apply_filters( 'register_taxonomy_args', $args, $taxonomy, (array) $object_type ); - if ( false !== $args['query_var'] && !empty($wp) ) { - if ( empty($args['query_var']) ) + $defaults = array( + 'labels' => array(), + 'description' => '', + 'public' => true, + 'publicly_queryable' => null, + '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 = array_merge( $defaults, $args ); + + if ( empty( $taxonomy ) || strlen( $taxonomy ) > 32 ) { + _doing_it_wrong( __FUNCTION__, __( 'Taxonomy names must be between 1 and 32 characters in length.' ), '4.2.0' ); + return new WP_Error( 'taxonomy_length_invalid', __( 'Taxonomy names must be between 1 and 32 characters in length.' ) ); + } + + // If not set, default to the setting for public. + if ( null === $args['publicly_queryable'] ) { + $args['publicly_queryable'] = $args['public']; + } + + // Non-publicly queryable taxonomies should not register query vars, except in the admin. + if ( false !== $args['query_var'] && ( is_admin() || false !== $args['publicly_queryable'] ) && ! 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'] ); + } else { + // Force query_var to false for non-public taxonomies. + $args['query_var'] = false; + } + + if ( false !== $args['rewrite'] && ( is_admin() || '' != get_option( 'permalink_structure' ) ) ) { + $args['rewrite'] = wp_parse_args( $args['rewrite'], array( + 'with_front' => true, + '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 + $tag = '([^/]+)'; + + add_rewrite_tag( "%$taxonomy%", $tag, $args['query_var'] ? "{$args['query_var']}=" : "taxonomy=$taxonomy&term=" ); + add_permastruct( $taxonomy, "{$args['rewrite']['slug']}/%$taxonomy%", $args['rewrite'] ); } - if ( false !== $args['rewrite'] && !empty($wp_rewrite) ) { - if ( !is_array($args['rewrite']) ) - $args['rewrite'] = array(); - if ( !isset($args['rewrite']['slug']) ) - $args['rewrite']['slug'] = sanitize_title_with_dashes($taxonomy); - $wp_rewrite->add_rewrite_tag("%$taxonomy%", '([^/]+)', $args['query_var'] ? "{$args['query_var']}=" : "taxonomy=$taxonomy&term=$term"); - $wp_rewrite->add_permastruct($taxonomy, "{$args['rewrite']['slug']}/%$taxonomy%"); + // If not set, default to the setting for public. + if ( null === $args['show_ui'] ) + $args['show_ui'] = $args['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 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', + 'delete_terms' => 'manage_categories', + 'assign_terms' => 'edit_posts', + ); + $args['cap'] = (object) array_merge( $default_caps, $args['capabilities'] ); + unset( $args['capabilities'] ); + $args['name'] = $taxonomy; - $args['object_type'] = $object_type; - $wp_taxonomies[$taxonomy] = (object) $args; + $args['object_type'] = array_unique( (array) $object_type ); + + $args['labels'] = get_taxonomy_labels( (object) $args ); + $args['label'] = $args['labels']->name; + + // 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 meta box. + 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 ); +} + +/** + * Unregisters a taxonomy. + * + * Can not be used to unregister built-in taxonomies. + * + * @since 4.5.0 + * + * @global WP $wp Current WordPress environment instance. + * @global array $wp_taxonomies List of taxonomies. + * + * @param string $taxonomy Taxonomy name. + * @return bool|WP_Error True on success, WP_Error on failure or if the taxonomy doesn't exist. + */ +function unregister_taxonomy( $taxonomy ) { + if ( ! taxonomy_exists( $taxonomy ) ) { + return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) ); + } + + $taxonomy_args = get_taxonomy( $taxonomy ); + + // Do not allow unregistering internal taxonomies. + if ( $taxonomy_args->_builtin ) { + return new WP_Error( 'invalid_taxonomy', __( 'Unregistering a built-in taxonomy is not allowed' ) ); + } + + global $wp, $wp_taxonomies; + + // Remove query var. + if ( false !== $taxonomy_args->query_var ) { + $wp->remove_query_var( $taxonomy_args->query_var ); + } + + // Remove rewrite tags and permastructs. + if ( false !== $taxonomy_args->rewrite ) { + remove_rewrite_tag( "%$taxonomy%" ); + remove_permastruct( $taxonomy ); + } + + // Unregister callback handling for meta box. + remove_filter( 'wp_ajax_add-' . $taxonomy, '_wp_ajax_add_hierarchical_term' ); + + // Remove the taxonomy. + unset( $wp_taxonomies[ $taxonomy ] ); + + /** + * Fires after a taxonomy is unregistered. + * + * @since 4.5.0 + * + * @param string $taxonomy Taxonomy name. + */ + do_action( 'unregistered_taxonomy', $taxonomy ); + + return true; +} + +/** + * 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 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 + * - 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. + * - 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. + * - items_list_navigation - String for the table pagination hidden heading. + * - items_list - String for the table hidden heading. + * + * 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 + * @since 4.3.0 Added the `no_terms` label. + * @since 4.4.0 Added the `items_list_navigation` and `items_list` labels. + * + * @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( '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' ) ), + 'items_list_navigation' => array( __( 'Tags list navigation' ), __( 'Categories list navigation' ) ), + 'items_list' => array( __( 'Tags list' ), __( 'Categories list' ) ), + ); + $nohier_vs_hier_defaults['menu_name'] = $nohier_vs_hier_defaults['name']; + + $labels = _get_custom_object_labels( $tax, $nohier_vs_hier_defaults ); + + $taxonomy = $tax->name; + + $default_labels = clone $labels; + + /** + * Filters the labels of a specific taxonomy. + * + * The dynamic portion of the hook name, `$taxonomy`, refers to the taxonomy slug. + * + * @since 4.4.0 + * + * @see get_taxonomy_labels() for the full list of taxonomy labels. + * + * @param object $labels Object with labels for the taxonomy as member variables. + */ + $labels = apply_filters( "taxonomy_labels_{$taxonomy}", $labels ); + + // Ensure that the filtered labels contain all required default values. + $labels = (object) array_merge( (array) $default_labels, (array) $labels ); + + return $labels; +} + +/** + * Add an already registered taxonomy to an object type. + * + * @since 3.0.0 + * + * @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 register_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; + + 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; } // @@ -184,233 +701,311 @@ function register_taxonomy( $taxonomy, $object_type, $args = array() ) { // /** - * get_objects_in_term() - Return object_ids of valid taxonomy and term + * Retrieve object_ids of valid taxonomy and term. * - * The strings of $taxonomies must exist before this function will continue. On failure of finding - * a valid taxonomy, it will return an WP_Error class, kind of like Exceptions in PHP 5, except you - * can't catch them. Even so, you can still test for the WP_Error class and get the error message. + * The strings of $taxonomies must exist before this function will continue. On + * failure of finding a valid taxonomy, it will return an WP_Error class, kind + * of like Exceptions in PHP 5, except you can't catch them. Even so, you can + * still test for the WP_Error class and get the error message. * - * The $terms aren't checked the same as $taxonomies, but still need to exist for $object_ids to - * be returned. + * The $terms aren't checked the same as $taxonomies, but still need to exist + * for $object_ids to be returned. * - * It is possible to change the order that object_ids is returned by either 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'. + * It is possible to change the order that object_ids is returned by either + * 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 + * @since 2.3.0 * - * @uses $wpdb - * @uses wp_parse_args() Creates an array from string $args. + * @global wpdb $wpdb WordPress database abstraction object. * - * @param string|array $terms String of term or array of string values 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( $terms, $taxonomies, $args = array() ) { +function get_objects_in_term( $term_ids, $taxonomies, $args = array() ) { global $wpdb; - if ( !is_array( $terms) ) - $terms = array($terms); - - if ( !is_array($taxonomies) ) - $taxonomies = array($taxonomies); - - foreach ( $taxonomies as $taxonomy ) { - if ( ! is_taxonomy($taxonomy) ) - return new WP_Error('invalid_taxonomy', __('Invalid Taxonomy')); + if ( ! is_array( $term_ids ) ) { + $term_ids = array( $term_ids ); + } + if ( ! is_array( $taxonomies ) ) { + $taxonomies = array( $taxonomies ); + } + foreach ( (array) $taxonomies as $taxonomy ) { + if ( ! taxonomy_exists( $taxonomy ) ) { + return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) ); + } } - $defaults = array('order' => 'ASC'); + $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'; - $terms = array_map('intval', $terms); + $term_ids = array_map('intval', $term_ids ); - $taxonomies = "'" . implode("', '", $taxonomies) . "'"; - $terms = "'" . implode("', '", $terms) . "'"; + $taxonomies = "'" . implode( "', '", array_map( 'esc_sql', $taxonomies ) ) . "'"; + $term_ids = "'" . implode( "', '", $term_ids ) . "'"; - $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 ($terms) ORDER BY tr.object_id $order"); + $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; } /** - * get_term() - Get all Term data from database by Term ID. + * Given a taxonomy query, generates SQL to be appended to a main query. + * + * @since 3.1.0 + * + * @see WP_Tax_Query + * + * @param array $tax_query A compact tax query + * @param string $primary_table + * @param string $primary_id_column + * @return array + */ +function get_tax_sql( $tax_query, $primary_table, $primary_id_column ) { + $tax_query_obj = new WP_Tax_Query( $tax_query ); + return $tax_query_obj->get_sql( $primary_table, $primary_id_column ); +} + +/** + * Get all Term data from database by Term ID. * - * The usage of the get_term function is to apply filters to a term object. - * It is possible to get a term object from the database before applying the + * The usage of the get_term function is to apply filters to a term object. It + * is possible to get a term object from the database before applying the * filters. * - * $term ID must be part of $taxonomy, to get from the database. Failure, might be - * able to be captured by the hooks. Failure would be the same value as $wpdb returns for the - * get_row method. + * $term ID must be part of $taxonomy, to get from the database. Failure, might + * be able to be captured by the hooks. Failure would be the same value as $wpdb + * returns for the get_row method. * - * There are two hooks, one is specifically for each term, named 'get_term', and the second is - * for the taxonomy name, 'term_$taxonomy'. Both hooks gets the term object, and the taxonomy - * name as parameters. Both hooks are expected to return a Term object. + * There are two hooks, one is specifically for each term, named 'get_term', and + * the second is for the taxonomy name, 'term_$taxonomy'. Both hooks gets the + * 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. Must return - * term object. Used in get_term() as a catch-all filter for every $term. + * {@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 name. Must return - * term object. $taxonomy will be the taxonomy name, so for example, if 'category', it would be - * 'get_category' as the filter name. Useful for custom taxonomies or plugging into default taxonomies. + * {@see 'get_$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 - * @since 2.3 + * @todo Better formatting for DocBlock * - * @uses $wpdb - * @uses sanitize_term() Cleanses the term based on $filter context before returning. + * @since 2.3.0 + * @since 4.4.0 Converted to return a WP_Term object if `$output` is `OBJECT`. + * The `$taxonomy` parameter was made optional. + * + * @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 - * exist then WP_Error will be returned. + * @param int|WP_Term|object $term If integer, term data will be fetched from the database, or from the cache if + * available. If stdClass object (as in the results of a database query), will apply + * filters and return a `WP_Term` object corresponding to the `$term` data. If `WP_Term`, + * will return `$term`. + * @param string $taxonomy Optional. Taxonomy name that $term is part of. + * @param string $output Constant OBJECT, ARRAY_A, or ARRAY_N + * @param string $filter Optional, default is raw or no WordPress defined filter will applied. + * @return array|WP_Term|WP_Error|null Object of the type specified by `$output` on success. When `$output` is 'OBJECT', + * a WP_Term instance is returned. If taxonomy does not exist, a WP_Error is + * returned. Returns null for miscellaneous failure. */ -function &get_term($term, $taxonomy, $output = OBJECT, $filter = 'raw') { - global $wpdb; - - if ( empty($term) ) - return null; +function get_term( $term, $taxonomy = '', $output = OBJECT, $filter = 'raw' ) { + if ( empty( $term ) ) { + return new WP_Error( 'invalid_term', __( 'Empty Term' ) ); + } - if ( ! is_taxonomy($taxonomy) ) - return new WP_Error('invalid_taxonomy', __('Invalid Taxonomy')); + if ( $taxonomy && ! taxonomy_exists( $taxonomy ) ) { + return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) ); + } - if ( is_object($term) ) { - wp_cache_add($term->term_id, $term, $taxonomy); + if ( $term instanceof WP_Term ) { $_term = $term; - } else { - $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, $term) ); - wp_cache_add($term, $_term, $taxonomy); + } elseif ( is_object( $term ) ) { + if ( empty( $term->filter ) || 'raw' === $term->filter ) { + $_term = sanitize_term( $term, $taxonomy, 'raw' ); + $_term = new WP_Term( $_term ); + } else { + $_term = WP_Term::get_instance( $term->term_id ); } + } else { + $_term = WP_Term::get_instance( $term, $taxonomy ); } - $_term = apply_filters('get_term', $_term, $taxonomy); - $_term = apply_filters("get_$taxonomy", $_term, $taxonomy); - $_term = sanitize_term($_term, $taxonomy, $filter); + if ( is_wp_error( $_term ) ) { + return $_term; + } elseif ( ! $_term ) { + return null; + } - if ( $output == OBJECT ) { + /** + * Filters a term. + * + * @since 2.3.0 + * @since 4.4.0 `$_term` can now also be a WP_Term object. + * + * @param int|WP_Term $_term Term object or ID. + * @param string $taxonomy The taxonomy slug. + */ + $_term = apply_filters( 'get_term', $_term, $taxonomy ); + + /** + * Filters a taxonomy. + * + * The dynamic portion of the filter name, `$taxonomy`, refers + * to the taxonomy slug. + * + * @since 2.3.0 + * @since 4.4.0 `$_term` can now also be a WP_Term object. + * + * @param int|WP_Term $_term Term object or ID. + * @param string $taxonomy The taxonomy slug. + */ + $_term = apply_filters( "get_$taxonomy", $_term, $taxonomy ); + + // Bail if a filter callback has changed the type of the `$_term` object. + if ( ! ( $_term instanceof WP_Term ) ) { return $_term; - } elseif ( $output == ARRAY_A ) { - return get_object_vars($_term); + } + + // Sanitize term, according to the specified filter. + $_term->filter( $filter ); + + if ( $output == ARRAY_A ) { + return $_term->to_array(); } elseif ( $output == ARRAY_N ) { - return array_values(get_object_vars($_term)); - } else { - return $_term; + return array_values( $_term->to_array() ); } + + return $_term; } /** - * get_term_by() - Get all Term data from database by Term field and data. + * Get all Term data from database by Term field and data. * - * Warning: $value is not escaped for 'name' $field. You must do it yourself, if required. + * Warning: $value is not escaped for 'name' $field. You must do it yourself, if + * required. * - * The default $field is 'id', therefore it is possible to also use null for field, but not - * recommended that you do so. + * The default $field is 'id', therefore it is possible to also use null for + * field, but not recommended that you do so. * - * 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. + * If $value does not exist, the return value will be false. If $taxonomy exists + * and $field and $value combinations exist, the Term will be returned. * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 + * This function will always return the first term that matches the `$field`- + * `$value`-`$taxonomy` combination specified in the parameters. If your query + * is likely to match more than one term (as is likely to be the case when + * `$field` is 'name', for example), consider using get_terms() instead; that + * way, you will get all matching terms, and can provide your own logic for + * deciding which one was intended. + * + * @todo Better formatting for DocBlock. + * + * @since 2.3.0 + * @since 4.4.0 `$taxonomy` is optional if `$field` is 'term_taxonomy_id'. Converted to return + * a WP_Term object if `$output` is `OBJECT`. * - * @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 $taxonomy Taxonomy name. Optional, if `$field` is 'term_taxonomy_id'. + * @param string $output Constant OBJECT, ARRAY_A, or ARRAY_N + * @param string $filter Optional, default is raw or no WordPress defined filter will applied. + * @return WP_Term|bool WP_Term instance on success. Will return false if `$taxonomy` does not exist + * or `$term` was not found. */ -function get_term_by($field, $value, $taxonomy, $output = OBJECT, $filter = 'raw') { +function get_term_by( $field, $value, $taxonomy = '', $output = OBJECT, $filter = 'raw' ) { global $wpdb; - if ( ! is_taxonomy($taxonomy) ) + // 'term_taxonomy_id' lookups don't require taxonomy checks. + if ( 'term_taxonomy_id' !== $field && ! taxonomy_exists( $taxonomy ) ) { return false; + } + + $tax_clause = $wpdb->prepare( "AND tt.taxonomy = %s", $taxonomy ); if ( 'slug' == $field ) { - $field = 't.slug'; + $_field = 't.slug'; $value = sanitize_title($value); if ( empty($value) ) return false; - } else if ( 'name' == $field ) { + } elseif ( 'name' == $field ) { // Assume already escaped - $field = 't.name'; - } else { - $field = 't.term_id'; + $value = wp_unslash($value); + $_field = 't.name'; + } elseif ( 'term_taxonomy_id' == $field ) { $value = (int) $value; + $_field = 'tt.term_taxonomy_id'; + + // No `taxonomy` clause when searching by 'term_taxonomy_id'. + $tax_clause = ''; + } else { + $term = get_term( (int) $value, $taxonomy, $output, $filter ); + if ( is_wp_error( $term ) || is_null( $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 $_field = %s", $value ) . " $tax_clause LIMIT 1" ); + if ( ! $term ) return false; - wp_cache_add($term->term_id, $term, $taxonomy); + // In the case of 'term_taxonomy_id', override the provided `$taxonomy` with whatever we find in the db. + if ( 'term_taxonomy_id' === $field ) { + $taxonomy = $term->taxonomy; + } - $term = sanitize_term($term, $taxonomy, $filter); + wp_cache_add( $term->term_id, $term, 'terms' ); - if ( $output == OBJECT ) { - return $term; - } elseif ( $output == ARRAY_A ) { - return get_object_vars($term); - } elseif ( $output == ARRAY_N ) { - return array_values(get_object_vars($term)); - } else { - return $term; - } + return get_term( $term, $taxonomy, $output, $filter ); } /** - * get_term_children() - Merge all term children into a single array. + * Merge all term children into a single array of their IDs. * - * This recursive function will merge all of the children of $term into - * the same array. Only useful for taxonomies which are hierarchical. + * This recursive function will merge all of the children of $term into the same + * array of term IDs. Only useful for taxonomies which are hierarchical. * * Will return an empty array if $term does not exist in $taxonomy. * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 - * - * @uses $wpdb - * @uses _get_term_hierarchy() - * @uses get_term_children() Used to get the children of both $taxonomy and the parent $term + * @since 2.3.0 * - * @param string $term Name 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, $taxonomy ) { - if ( ! is_taxonomy($taxonomy) ) - return new WP_Error('invalid_taxonomy', __('Invalid Taxonomy')); +function get_term_children( $term_id, $taxonomy ) { + if ( ! taxonomy_exists( $taxonomy ) ) { + return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) ); + } + + $term_id = intval( $term_id ); $terms = _get_term_hierarchy($taxonomy); - if ( ! isset($terms[$term]) ) + if ( ! isset($terms[$term_id]) ) return array(); - $children = $terms[$term]; + $children = $terms[$term_id]; + + foreach ( (array) $terms[$term_id] as $child ) { + if ( $term_id == $child ) { + continue; + } - foreach ( $terms[$term] as $child ) { if ( isset($terms[$child]) ) $children = array_merge($children, get_term_children($child, $taxonomy)); } @@ -419,26 +1014,22 @@ function get_term_children( $term, $taxonomy ) { } /** - * get_term_field() - Get sanitized Term field + * Get sanitized Term field. * - * Does checks for $term, based on the $taxonomy. The function is for - * contextual reasons and for simplicity of usage. See sanitize_term_field() for - * more information. + * The function is for contextual reasons and for simplicity of usage. * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 + * @since 2.3.0 + * @since 4.4.0 The `$taxonomy` parameter was made optional. `$term` can also now accept a WP_Term object. * - * @uses sanitize_term_field() Passes the return value in sanitize_term_field on success. + * @see sanitize_term_field() * - * @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|WP_Term $term Term ID or object. + * @param string $taxonomy Optional. Taxonomy Name. Default empty. + * @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; +function get_term_field( $field, $term, $taxonomy = '', $context = 'display' ) { $term = get_term( $term, $taxonomy ); if ( is_wp_error($term) ) return $term; @@ -449,24 +1040,20 @@ function get_term_field( $field, $term, $taxonomy, $context = 'display' ) { if ( !isset($term->$field) ) return ''; - return sanitize_term_field($field, $term->$field, $term->term_id, $taxonomy, $context); + return sanitize_term_field( $field, $term->$field, $term->term_id, $term->taxonomy, $context ); } /** - * get_term_to_edit() - Sanitizes Term for editing + * Sanitizes Term for editing. * - * Return value is sanitize_term() and usage is for sanitizing the term - * for editing. Function is for contextual and simplicity. + * 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 + * @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 ); @@ -481,348 +1068,468 @@ function get_term_to_edit( $id, $taxonomy ) { } /** - * get_terms() - Retrieve the terms in taxonomy or list of taxonomies. - * - * 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 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 $args. - * - * The list that $args can contain, which will overwrite the defaults. - * orderby - Default is 'name'. Can be name, count, or nothing (will use term_id). - * order - Default is ASC. Can use DESC. - * hide_empty - Default is true. Will not return empty $terms. - * fields - Default is all. - * slug - Any terms that has this value. Default is empty string. - * hierarchical - Whether to return hierarchical taxonomy. Default is true. - * name__like - Default is empty string. - * - * The argument 'pad_counts' will count all of the children along with the $terms. - * - * The 'get' argument allows for overwriting 'hide_empty' and 'child_of', which can be done by - * setting the value to 'all', instead of its default empty string value. - * - * The 'child_of' argument will be used if you use multiple taxonomy or the first $taxonomy - * isn't hierarchical or 'parent' isn't used. The default is 0, which will be translated to - * a false value. If 'child_of' is set, then 'child_of' value will be tested against - * $taxonomy to see if 'child_of' is contained within. Will return an empty array if test - * fails. - * - * If 'parent' is set, then it will be used to test against the first taxonomy. Much like - * 'child_of'. Will return an empty array if the test fails. - * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 - * - * @uses $wpdb - * @uses wp_parse_args() Merges the defaults with those defined by $args and allows for strings. - * - * - * @param string|array 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. + * Retrieve the terms in a given taxonomy or list of taxonomies. + * + * You can fully inject any customizations to the query before it is sent, as + * well as control the output with a filter. + * + * 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 {@see 'list_terms_exclusions'} filter passes the compiled exclusions along with + * the $args. + * + * The {@see 'get_terms_orderby'} filter passes the `ORDER BY` clause for the query + * along with the $args array. + * + * Prior to 4.5.0, the first parameter of `get_terms()` was a taxonomy or list of taxonomies: + * + * $terms = get_terms( 'post_tag', array( + * 'hide_empty' => false, + * ) ); + * + * Since 4.5.0, taxonomies should be passed via the 'taxonomy' argument in the `$args` array: + * + * $terms = get_terms( array( + * 'taxonomy' => 'post_tag', + * 'hide_empty' => false, + * ) ); + * + * @since 2.3.0 + * @since 4.2.0 Introduced 'name' and 'childless' parameters. + * @since 4.4.0 Introduced the ability to pass 'term_id' as an alias of 'id' for the `orderby` parameter. + * Introduced the 'meta_query' and 'update_term_meta_cache' parameters. Converted to return + * a list of WP_Term objects. + * @since 4.5.0 Changed the function signature so that the `$args` array can be provided as the first parameter. + * Introduced 'meta_key' and 'meta_value' parameters. Introduced the ability to order results by metadata. + * + * @internal The `$deprecated` parameter is parsed for backward compatibility only. + * + * @global wpdb $wpdb WordPress database abstraction object. + * @global array $wp_filter + * + * @param array|string $args { + * Optional. Array or string of arguments to get terms. + * + * @type string|array $taxonomy Taxonomy name, or array of taxonomies, to which results should + * be limited. + * @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 $include param, + * 'meta_value', 'meta_value_num', the value of `$meta_key`, the array + * keys of `$meta_query`, or 'none' to omit the ORDER BY clause. + * 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 complete + * term objects), 'ids' (returns an array of ids), 'id=>parent' (returns + * an associative array with ids as keys, parent term IDs as values), + * 'names' (returns an array of term names), 'count' (returns the number + * of matching terms), 'id=>name' (returns an associative array with ids + * as keys, term names as values), or 'id=>slug' (returns an associative + * array with ids as keys, term slugs as values). 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'. + * @type bool $update_term_meta_cache Whether to prime meta caches for matched terms. Default true. + * @type array $meta_query Meta query clauses to limit retrieved terms by. + * See `WP_Meta_Query`. Default empty. + * @type string $meta_key Limit terms to those matching a specific metadata key. Can be used in + * conjunction with `$meta_value`. + * @type string $meta_value Limit terms to those matching a specific metadata value. Usually used + * in conjunction with `$meta_key`. + * } + * @param array $deprecated Argument array, when using the legacy function parameter format. If present, this + * parameter will be interpreted as `$args`, and the first function parameter will + * be parsed as a taxonomy or array of taxonomies. + * @return array|int|WP_Error List of WP_Term instances and their children. Will return WP_Error, if any of $taxonomies + * do not exist. */ -function &get_terms($taxonomies, $args = '') { +function get_terms( $args = array(), $deprecated = '' ) { global $wpdb; - $empty_array = array(); - $single_taxonomy = false; - if ( !is_array($taxonomies) ) { - $single_taxonomy = true; - $taxonomies = array($taxonomies); + $term_query = new WP_Term_Query(); + + /* + * Legacy argument format ($taxonomy, $args) takes precedence. + * + * We detect legacy argument format by checking if + * (a) a second non-empty parameter is passed, or + * (b) the first parameter shares no keys with the default array (ie, it's a list of taxonomies) + */ + $_args = wp_parse_args( $args ); + $key_intersect = array_intersect_key( $term_query->query_var_defaults, (array) $_args ); + $do_legacy_args = $deprecated || empty( $key_intersect ); + + if ( $do_legacy_args ) { + $taxonomies = (array) $args; + $args = wp_parse_args( $deprecated ); + $args['taxonomy'] = $taxonomies; + } else { + $args = wp_parse_args( $args ); + if ( isset( $args['taxonomy'] ) && null !== $args['taxonomy'] ) { + $args['taxonomy'] = (array) $args['taxonomy']; + } } - foreach ( $taxonomies as $taxonomy ) { - if ( ! is_taxonomy($taxonomy) ) - return new WP_Error('invalid_taxonomy', __('Invalid Taxonomy')); + if ( ! empty( $args['taxonomy'] ) ) { + foreach ( $args['taxonomy'] as $taxonomy ) { + if ( ! taxonomy_exists( $taxonomy ) ) { + return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) ); + } + } } - $in_taxonomies = "'" . implode("', '", $taxonomies) . "'"; + $terms = $term_query->query( $args ); - $defaults = array('orderby' => 'name', 'order' => 'ASC', - 'hide_empty' => true, 'exclude' => '', 'include' => '', - 'number' => '', 'fields' => 'all', 'slug' => '', 'parent' => '', - 'hierarchical' => true, 'child_of' => 0, 'get' => '', 'name__like' => '', - 'pad_counts' => false, 'offset' => '', 'search' => ''); - $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; - $args['hierarchical'] = false; - $args['pad_counts'] = false; - } - - if ( 'all' == $args['get'] ) { - $args['child_of'] = 0; - $args['hide_empty'] = 0; - $args['hierarchical'] = false; - $args['pad_counts'] = false; + // Count queries are not filtered, for legacy reasons. + if ( ! is_array( $terms ) ) { + return $terms; } - extract($args, EXTR_SKIP); - if ( $child_of ) { - $hierarchy = _get_term_hierarchy($taxonomies[0]); - if ( !isset($hierarchy[$child_of]) ) - return $empty_array; - } + /** + * Filters the found terms. + * + * @since 2.3.0 + * @since 4.6.0 Added the `$term_query` parameter. + * + * @param array $terms Array of found terms. + * @param array $taxonomies An array of taxonomies. + * @param array $args An array of get_terms() arguments. + * @param WP_Term_Query $term_query The WP_Term_Query object. + */ + return apply_filters( 'get_terms', $terms, $term_query->query_vars['taxonomy'], $term_query->query_vars, $term_query ); +} - if ( $parent ) { - $hierarchy = _get_term_hierarchy($taxonomies[0]); - if ( !isset($hierarchy[$parent]) ) - return $empty_array; +/** + * Adds metadata to a term. + * + * @since 4.4.0 + * + * @param int $term_id Term ID. + * @param string $meta_key Metadata name. + * @param mixed $meta_value Metadata value. + * @param bool $unique Optional. Whether to bail if an entry with the same key is found for the term. + * Default false. + * @return int|WP_Error|bool Meta ID on success. WP_Error when term_id is ambiguous between taxonomies. + * False on failure. + */ +function add_term_meta( $term_id, $meta_key, $meta_value, $unique = false ) { + // Bail if term meta table is not installed. + if ( get_option( 'db_version' ) < 34370 ) { + return false; } - // $args can be whatever, only use the args defined in defaults to compute the key - $key = md5( serialize( compact(array_keys($defaults)) ) . serialize( $taxonomies ) ); - - if ( $cache = wp_cache_get( 'get_terms', 'terms' ) ) { - if ( isset( $cache[ $key ] ) ) - return apply_filters('get_terms', $cache[$key], $taxonomies, $args); + if ( wp_term_is_shared( $term_id ) ) { + return new WP_Error( 'ambiguous_term_id', __( 'Term meta cannot be added to terms that are shared between taxonomies.'), $term_id ); } - 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 - $orderby = 't.term_id'; + $added = add_metadata( 'term', $term_id, $meta_key, $meta_value, $unique ); - $where = ''; - $inclusions = ''; - if ( !empty($include) ) { - $exclude = ''; - $interms = preg_split('/[\s,]+/',$include); - if ( count($interms) ) { - foreach ( $interms as $interm ) { - if (empty($inclusions)) - $inclusions = ' AND ( t.term_id = ' . intval($interm) . ' '; - else - $inclusions .= ' OR t.term_id = ' . intval($interm) . ' '; - } - } + // Bust term query cache. + if ( $added ) { + wp_cache_set( 'last_changed', microtime(), 'terms' ); } - if ( !empty($inclusions) ) - $inclusions .= ')'; - $where .= $inclusions; + return $added; +} - $exclusions = ''; - if ( !empty($exclude) ) { - $exterms = preg_split('/[\s,]+/',$exclude); - if ( count($exterms) ) { - foreach ( $exterms as $exterm ) { - if (empty($exclusions)) - $exclusions = ' AND ( t.term_id <> ' . intval($exterm) . ' '; - else - $exclusions .= ' AND t.term_id <> ' . intval($exterm) . ' '; - } - } +/** + * Removes metadata matching criteria from a term. + * + * @since 4.4.0 + * + * @param int $term_id Term ID. + * @param string $meta_key Metadata name. + * @param mixed $meta_value Optional. Metadata value. If provided, rows will only be removed that match the value. + * @return bool True on success, false on failure. + */ +function delete_term_meta( $term_id, $meta_key, $meta_value = '' ) { + // Bail if term meta table is not installed. + if ( get_option( 'db_version' ) < 34370 ) { + return false; } - if ( !empty($exclusions) ) - $exclusions .= ')'; - $exclusions = apply_filters('list_terms_exclusions', $exclusions, $args ); - $where .= $exclusions; + $deleted = delete_metadata( 'term', $term_id, $meta_key, $meta_value ); - if ( !empty($slug) ) { - $slug = sanitize_title($slug); - $where .= " AND t.slug = '$slug'"; + // Bust term query cache. + if ( $deleted ) { + wp_cache_set( 'last_changed', microtime(), 'terms' ); } - if ( !empty($name__like) ) - $where .= " AND t.name LIKE '{$name__like}%'"; + return $deleted; +} - if ( '' != $parent ) { - $parent = (int) $parent; - $where .= " AND tt.parent = '$parent'"; +/** + * Retrieves metadata for a term. + * + * @since 4.4.0 + * + * @param int $term_id Term ID. + * @param string $key Optional. The meta key to retrieve. If no key is provided, fetches all metadata for the term. + * @param bool $single Whether to return a single value. If false, an array of all values matching the + * `$term_id`/`$key` pair will be returned. Default: false. + * @return mixed If `$single` is false, an array of metadata values. If `$single` is true, a single metadata value. + */ +function get_term_meta( $term_id, $key = '', $single = false ) { + // Bail if term meta table is not installed. + if ( get_option( 'db_version' ) < 34370 ) { + return false; } - if ( $hide_empty && !$hierarchical ) - $where .= ' AND tt.count > 0'; - - if ( !empty($number) ) { - if( $offset ) - $number = 'LIMIT ' . $offset . ',' . $number; - else - $number = 'LIMIT ' . $number; + return get_metadata( 'term', $term_id, $key, $single ); +} - } else - $number = ''; - - if ( !empty($search) ) { - $search = like_escape($search); - $where .= " AND (t.name LIKE '%$search%')"; +/** + * Updates term metadata. + * + * Use the `$prev_value` parameter to differentiate between meta fields with the same key and term ID. + * + * If the meta field for the term does not exist, it will be added. + * + * @since 4.4.0 + * + * @param int $term_id Term ID. + * @param string $meta_key Metadata key. + * @param mixed $meta_value Metadata value. + * @param mixed $prev_value Optional. Previous value to check before removing. + * @return int|WP_Error|bool Meta ID if the key didn't previously exist. True on successful update. + * WP_Error when term_id is ambiguous between taxonomies. False on failure. + */ +function update_term_meta( $term_id, $meta_key, $meta_value, $prev_value = '' ) { + // Bail if term meta table is not installed. + if ( get_option( 'db_version' ) < 34370 ) { + return false; } - $select_this = ''; - if ( 'all' == $fields ) - $select_this = 't.*, tt.*'; - else if ( 'ids' == $fields ) - $select_this = 't.term_id'; - else if ( 'names' == $fields ) - $select_this = 't.name'; - - $query = "SELECT $select_this FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy IN ($in_taxonomies) $where ORDER BY $orderby $order $number"; - - if ( 'all' == $fields ) { - $terms = $wpdb->get_results($query); - update_term_cache($terms); - } else if ( ('ids' == $fields) || ('names' == $fields) ) { - $terms = $wpdb->get_col($query); + if ( wp_term_is_shared( $term_id ) ) { + return new WP_Error( 'ambiguous_term_id', __( 'Term meta cannot be added to terms that are shared between taxonomies.'), $term_id ); } - if ( empty($terms) ) { - $cache[ $key ] = array(); - wp_cache_set( 'get_terms', $cache, 'terms' ); - return apply_filters('get_terms', array(), $taxonomies, $args); - } + $updated = update_metadata( 'term', $term_id, $meta_key, $meta_value, $prev_value ); - if ( $child_of || $hierarchical ) { - $children = _get_term_hierarchy($taxonomies[0]); - if ( ! empty($children) ) - $terms = & _get_term_children($child_of, $terms, $taxonomies[0]); + // Bust term query cache. + if ( $updated ) { + wp_cache_set( 'last_changed', microtime(), 'terms' ); } - // Update term counts to include children. - if ( $pad_counts ) - _pad_term_counts($terms, $taxonomies[0]); - - // Make sure we show empty categories that have children. - if ( $hierarchical && $hide_empty ) { - foreach ( $terms as $k => $term ) { - if ( ! $term->count ) { - $children = _get_term_children($term->term_id, $terms, $taxonomies[0]); - foreach ( $children as $child ) - if ( $child->count ) - continue 2; + return $updated; +} - // It really is empty - unset($terms[$k]); - } - } +/** + * Updates metadata cache for list of term IDs. + * + * Performs SQL query to retrieve all metadata for the terms matching `$term_ids` and stores them in the cache. + * Subsequent calls to `get_term_meta()` will not need to query the database. + * + * @since 4.4.0 + * + * @param array $term_ids List of term IDs. + * @return array|false Returns false if there is nothing to update. Returns an array of metadata on success. + */ +function update_termmeta_cache( $term_ids ) { + // Bail if term meta table is not installed. + if ( get_option( 'db_version' ) < 34370 ) { + return; } - reset ( $terms ); - $cache[ $key ] = $terms; - wp_cache_set( 'get_terms', $cache, 'terms' ); - - $terms = apply_filters('get_terms', $terms, $taxonomies, $args); - return $terms; + return update_meta_cache( 'term', $term_ids ); } /** - * is_term() - Check if Term exists + * 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 2.3 + * @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 - * @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 $parent Optional. ID of parent term under which to confine the exists search. + * @return mixed Returns null if the term does not exist. Returns the term ID + * if no taxonomy is specified and the term ID exists. Returns + * an array of the term ID and the term taxonomy ID the taxonomy + * is specified and the pairing exists. */ -function is_term($term, $taxonomy = '') { +function term_exists( $term, $taxonomy = '', $parent = null ) { global $wpdb; + $select = "SELECT term_id FROM $wpdb->terms as t WHERE "; + $tax_select = "SELECT tt.term_id, tt.term_taxonomy_id FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy as tt ON tt.term_id = t.term_id WHERE "; + if ( is_int($term) ) { if ( 0 == $term ) return 0; - $where = $wpdb->prepare( "t.term_id = %d", $term ); - } else { - if ( '' === $term = sanitize_title($term) ) - return 0; - $where = $wpdb->prepare( "t.slug = %s", $term ); + $where = 't.term_id = %d'; + if ( !empty($taxonomy) ) + return $wpdb->get_row( $wpdb->prepare( $tax_select . $where . " AND tt.taxonomy = %s", $term, $taxonomy ), ARRAY_A ); + else + return $wpdb->get_var( $wpdb->prepare( $select . $where, $term ) ); + } + + $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) ) { + if ( is_numeric( $parent ) ) { + $parent = (int) $parent; + $where_fields[] = $parent; + $else_where_fields[] = $parent; + $where .= ' AND tt.parent = %d'; + $else_where .= ' AND tt.parent = %d'; + } + + $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 $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 $orderby $limit", $else_where_fields), ARRAY_A); } - if ( !empty($taxonomy) ) - return $wpdb->get_row("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 $where AND tt.taxonomy = '$taxonomy'", ARRAY_A); + 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("SELECT term_id FROM $wpdb->terms as t WHERE $where"); + return $wpdb->get_var( $wpdb->prepare("SELECT term_id FROM $wpdb->terms as t WHERE $else_where $orderby $limit", $else_where_fields) ); } /** - * sanitize_term() - Sanitize Term all fields + * Check if a term is an ancestor of another term. * - * Relys 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(). + * You can use either an id or the term object for both parameters. * - * The $term is expected to be either an array or an object. + * @since 3.4.0 * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 + * @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. + * + * 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(). * - * @uses sanitize_term_field Used to sanitize all fields in a term + * The $term is expected to be either an array or an object. + * + * @since 2.3.0 * - * @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 = is_object( $term ); - $do_object = false; - if ( is_object($term) ) - $do_object = true; + $term_id = $do_object ? $term->term_id : (isset($term['term_id']) ? $term['term_id'] : 0); - foreach ( $fields as $field ) { - if ( $do_object ) - $term->$field = sanitize_term_field($field, $term->$field, $term->term_id, $taxonomy, $context); - else - $term[$field] = sanitize_term_field($field, $term[$field], $term['term_id'], $taxonomy, $context); + foreach ( (array) $fields as $field ) { + if ( $do_object ) { + if ( isset($term->$field) ) + $term->$field = sanitize_term_field($field, $term->$field, $term_id, $taxonomy, $context); + } else { + if ( isset($term[$field]) ) + $term[$field] = sanitize_term_field($field, $term[$field], $term_id, $taxonomy, $context); + } } + if ( $do_object ) + $term->filter = $context; + else + $term['filter'] = $context; + return $term; } /** - * sanitize_term_field() - Cleanse the field value in the term based on the context + * Cleanse the field value in the term based on the context. * - * Passing a term field value through the function should be assumed to have cleansed - * the value for whatever context the term field is going to be used. + * Passing a term field value through the function should be assumed to have + * cleansed the value for whatever context the term field is going to be used. * - * If no context or an unsupported context is given, then default filters will be applied. + * If no context or an unsupported context is given, then default filters will + * be applied. * - * There are enough filters for each context to support a custom filtering without creating - * your own filter function. Simply create a function that hooks into the filter you need. - * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 + * There are enough filters for each context to support a custom filtering + * without creating your own filter function. Simply create a function that + * hooks into the filter you need. * - * @uses $wpdb + * @since 2.3.0 * - * @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 ) $value = 0; @@ -832,128 +1539,227 @@ function sanitize_term_field($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, $term_id); + + /** + * Filters a term field to edit before it is sanitized. + * + * The dynamic portion of the filter name, `$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, $taxonomy ); + + /** + * Filters the taxonomy field to edit before it is sanitized. + * + * The dynamic portions of the filter name, `$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 ) - $value = format_to_edit($value); + $value = esc_html($value); // textarea_escaped else - $value = attribute_escape($value); - } else if ( 'db' == $context ) { - $value = apply_filters("pre_term_$field", $value, $taxonomy); - $value = apply_filters("pre_${taxonomy}_$field", $value); + $value = esc_attr($value); + } elseif ( 'db' == $context ) { + + /** + * Filters a term field value before it is sanitized. + * + * The dynamic portion of the filter name, `$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, $taxonomy ); + + /** + * Filters a taxonomy field before it is sanitized. + * + * The dynamic portions of the filter name, `$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' == $field ) { + /** + * Filters the category nicename before it is sanitized. + * + * Use the {@see 'pre_$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' == $context ) { + + /** + * Filters the term field for use in RSS. + * + * The dynamic portion of the filter name, `$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, $taxonomy ); + + /** + * Filters the taxonomy field for use in RSS. + * + * The dynamic portions of the hook name, `$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); - } - if ( 'attribute' == $context ) - $value = attribute_escape($value); - else if ( 'js' == $context ) - $value = js_escape($value); + /** + * Filters 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, $context ); + + /** + * Filters the taxonomy field sanitized for display. + * + * The dynamic portions of the filter name, `$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 ) { + $value = esc_attr($value); + } elseif ( 'js' == $context ) { + $value = esc_js($value); + } return $value; } /** - * wp_count_terms() - Count how many terms are in Taxonomy + * Count how many terms are in Taxonomy. * - * Default $args is 'ignore_empty' which can be 'ignore_empty=true' or - * array('ignore_empty' => true);. + * Default $args is 'hide_empty' which can be 'hide_empty=true' or array('hide_empty' => true). * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 + * @since 2.3.0 * - * @uses $wpdb - * @uses wp_parse_args() Turns strings into arrays and merges defaults into an array. - * - * @param string $taxonomy Taxonomy name - * @param array|string $args Overwrite defaults - * @return int How many terms are in $taxonomy + * @param string $taxonomy Taxonomy name. + * @param array|string $args Optional. Array of arguments that get passed to get_terms(). + * Default empty array. + * @return array|int|WP_Error Number of terms in that taxonomy or WP_Error if the taxonomy does not exist. */ function wp_count_terms( $taxonomy, $args = array() ) { - global $wpdb; - - $defaults = array('ignore_empty' => false); + $defaults = array('hide_empty' => false); $args = wp_parse_args($args, $defaults); - extract($args, EXTR_SKIP); - $where = ''; - if ( $ignore_empty ) - $where = 'AND count > 0'; + // backward compatibility + if ( isset($args['ignore_empty']) ) { + $args['hide_empty'] = $args['ignore_empty']; + unset($args['ignore_empty']); + } + + $args['fields'] = 'count'; - $taxonomy = $wpdb->escape( $taxonomy ); - return $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->term_taxonomy WHERE taxonomy = '$taxonomy' $where"); + return get_terms($taxonomy, $args); } /** - * wp_delete_object_term_relationships() - Will unlink the term from the taxonomy + * Will unlink the object from the taxonomy or taxonomies. * - * Will remove the term's relationship to the taxonomy, not the term or taxonomy itself. - * The term and taxonomy will still exist. Will require the term's object ID to perform - * the operation. + * Will remove all relationships between the object and any terms in + * a particular taxonomy or taxonomies. Does not remove the term or + * taxonomy itself. * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 - * @uses $wpdb + * @since 2.3.0 * - * @param int $object_id The term Object Id that refers to the term - * @param string|array $taxonomy List of Taxonomy Names or single Taxonomy name. + * @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 ( $taxonomies as $taxonomy ) { - $terms = wp_get_object_terms($object_id, $taxonomy, 'fields=tt_ids'); - $in_terms = "'" . implode("', '", $terms) . "'"; - $wpdb->query("DELETE FROM $wpdb->term_relationships WHERE object_id = '$object_id' AND term_taxonomy_id IN ($in_terms)"); - wp_update_term_count($terms, $taxonomy); + foreach ( (array) $taxonomies as $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 ); } } /** - * wp_delete_term() - Removes a term from the database. + * Removes a term from the database. * - * If the term is a parent of other terms, then the children will be updated - * to that term's parent. + * 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 - * term found. Any other and the found terms are used. + * Metadata associated with the term will be deleted. * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 + * @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. Array of arguments to override the default term ID. Default empty array. + * + * @type int $default The term ID to make the default term. This will only override + * the terms found if there is only one term found. Any other and + * the found terms are used. + * @type bool $force_default Optional. Whether to force the supplied term as default to be + * assigned even if the object was not going to be term-less. + * Default false. + * } + * @return bool|int|WP_Error True on success, false if term does not exist. Zero on attempted + * deletion of default Category. WP_Error if the taxonomy does not exist. */ function wp_delete_term( $term, $taxonomy, $args = array() ) { global $wpdb; $term = (int) $term; - if ( ! $ids = is_term($term, $taxonomy) ) + if ( ! $ids = term_exists($term, $taxonomy) ) return false; if ( is_wp_error( $ids ) ) return $ids; @@ -961,15 +1767,36 @@ function wp_delete_term( $term, $taxonomy, $args = array() ) { $tt_id = $ids['term_taxonomy_id']; $defaults = array(); + + if ( 'category' == $taxonomy ) { + $defaults['default'] = get_option( 'default_category' ); + if ( $defaults['default'] == $term ) + return 0; // Don't delete the default category + } + $args = wp_parse_args($args, $defaults); - extract($args, EXTR_SKIP); - if ( isset($default) ) { - $default = (int) $default; - if ( ! is_term($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); @@ -977,326 +1804,749 @@ function wp_delete_term( $term, $taxonomy, $args = array() ) { return $term_obj; $parent = $term_obj->parent; + $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 ); } - $objects = $wpdb->get_col( $wpdb->prepare( "SELECT object_id FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $tt_id ) ); + // Get the term before deleting it or its term relationships so we can pass to actions below. + $deleted_term = get_term( $term, $taxonomy ); + + $object_ids = (array) $wpdb->get_col( $wpdb->prepare( "SELECT object_id FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $tt_id ) ); - foreach ( (array) $objects as $object ) { - $terms = wp_get_object_terms($object, $taxonomy, 'fields=ids'); - if ( 1 == count($terms) && isset($default) ) + foreach ( $object_ids as $object_id ) { + $terms = wp_get_object_terms( $object_id, $taxonomy, array( 'fields' => 'ids', 'orderby' => 'none' ) ); + if ( 1 == count($terms) && isset($default) ) { $terms = array($default); - else + } else { $terms = array_diff($terms, array($term)); + if (isset($default) && isset($force_default) && $force_default) + $terms = array_merge($terms, array($default)); + } $terms = array_map('intval', $terms); - wp_set_object_terms($object, $terms, $taxonomy); + wp_set_object_terms( $object_id, $terms, $taxonomy ); + } + + // 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( $object_ids, $object_type ); + + $term_meta_ids = $wpdb->get_col( $wpdb->prepare( "SELECT meta_id FROM $wpdb->termmeta WHERE term_id = %d ", $term ) ); + foreach ( $term_meta_ids as $mid ) { + delete_metadata_by_mid( 'term', $mid ); } - $wpdb->query( $wpdb->prepare( "DELETE FROM $wpdb->term_taxonomy WHERE term_taxonomy_id = %d", $tt_id ) ); + /** + * 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->query( $wpdb->prepare( "DELETE FROM $wpdb->terms 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, $tt_id); + /** + * Fires after a term is deleted from the database and the cache is cleaned. + * + * @since 2.5.0 + * @since 4.5.0 Introduced the `$object_ids` argument. + * + * @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. + * @param array $object_ids List of term object IDs. + */ + do_action( 'delete_term', $term, $tt_id, $taxonomy, $deleted_term, $object_ids ); + + /** + * Fires after a term in a specific taxonomy is deleted. + * + * The dynamic portion of the hook name, `$taxonomy`, refers to the specific + * taxonomy the term belonged to. + * + * @since 2.3.0 + * @since 4.5.0 Introduced the `$object_ids` argument. + * + * @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. + * @param array $object_ids List of term object IDs. + */ + do_action( "delete_$taxonomy", $term, $tt_id, $deleted_term, $object_ids ); return true; } /** - * wp_get_object_terms() - Retrieves the terms associated with the given object(s), in the supplied taxonomies. + * Deletes one existing category. * - * 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. + * @since 2.0.0 * - * 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'. + * @param int $cat_ID + * @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 ) { + return wp_delete_term( $cat_ID, 'category' ); +} + +/** + * Retrieves the terms associated with the given object(s), in the supplied taxonomies. * - * The fields argument also decides what will be returned. If 'all' or 'all_with_object_id' is choosen or - * the default kept intact, then all matching terms objects will be returned. If either 'ids' or 'names' - * is used, then an array of all matching term ids or term names will be returned respectively. + * @since 2.3.0 + * @since 4.2.0 Added support for 'taxonomy', 'parent', and 'term_taxonomy_id' values of `$orderby`. + * Introduced `$parent` argument. + * @since 4.4.0 Introduced `$meta_query` and `$update_term_meta_cache` arguments. When `$fields` is 'all' or + * 'all_with_object_id', an array of `WP_Term` objects will be returned. * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 - * @uses $wpdb + * @global wpdb $wpdb WordPress database abstraction object. * - * @param int|array $object_id The id of the object(s) to retrieve. + * @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. + * @type bool $update_term_meta_cache Whether to prime termmeta cache for matched terms. Only applies when + * `$fields` is 'all', 'all_with_object_id', or 'term_id'. Default true. + * @type array $meta_query Meta query clauses to limit retrieved terms by. See `WP_Meta_Query`. + * Default empty. + * } + * @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 ( $taxonomies as $taxonomy ) { - if ( ! is_taxonomy($taxonomy) ) - return new WP_Error('invalid_taxonomy', __('Invalid Taxonomy')); + if ( ! taxonomy_exists($taxonomy) ) + return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) ); } if ( !is_array($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' => '', + 'update_term_meta_cache' => true, + 'meta_query' => '', + ); $args = wp_parse_args( $args, $defaults ); $terms = array(); if ( count($taxonomies) > 1 ) { foreach ( $taxonomies as $index => $taxonomy ) { $t = get_taxonomy($taxonomy); - if ( is_array($t->args) && $args != array_merge($args, $t->args) ) { + if ( isset($t->args) && is_array($t->args) && $args != array_merge($args, $t->args) ) { unset($taxonomies[$index]); $terms = array_merge($terms, wp_get_object_terms($object_ids, $taxonomy, array_merge($args, $t->args))); } } } else { $t = get_taxonomy($taxonomies[0]); - if ( is_array($t->args) ) + if ( isset($t->args) && is_array($t->args) ) $args = array_merge($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 + } elseif ( 'none' === $orderby ) { + $orderby = ''; + $order = ''; + } else { $orderby = 't.term_id'; + } + + // tt_ids queries can only be none or tr.term_taxonomy_id + if ( ('tt_ids' == $fields) && !empty($orderby) ) + $orderby = 'tr.term_taxonomy_id'; - $taxonomies = "'" . implode("', '", $taxonomies) . "'"; + if ( !empty($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("', '", array_map( 'esc_sql', $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) ORDER BY $orderby $order"; + // Meta query support. + $meta_query_join = ''; + if ( ! empty( $args['meta_query'] ) ) { + $mquery = new WP_Meta_Query( $args['meta_query'] ); + $mq_sql = $mquery->get_sql( 'term', 't', 'term_id' ); + $meta_query_join .= $mq_sql['join']; + + // Strip leading AND. + $where[] = preg_replace( '/^\s*AND/', '', $mq_sql['where'] ); + } + + $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 $meta_query_join 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_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) ORDER BY tr.term_taxonomy_id $order"); + $_terms = $wpdb->get_results( $query ); + $object_id_index = array(); + foreach ( $_terms as $key => $term ) { + $term = sanitize_term( $term, $taxonomy, 'raw' ); + $_terms[ $key ] = $term; + + if ( isset( $term->object_id ) ) { + $object_id_index[ $key ] = $term->object_id; + } + } + + update_term_cache( $_terms ); + $_terms = array_map( 'get_term', $_terms ); + + // Re-add the object_id data, which is lost when fetching terms from cache. + if ( 'all_with_object_id' === $fields ) { + foreach ( $_terms as $key => $_term ) { + if ( isset( $object_id_index[ $key ] ) ) { + $_term->object_id = $object_id_index[ $key ]; + } + } + } + + $terms = array_merge( $terms, $_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 ) - return array(); + // Update termmeta cache, if necessary. + if ( $args['update_term_meta_cache'] && ( 'all' === $fields || 'all_with_object_id' === $fields || 'ids' === $fields ) ) { + if ( 'ids' === $fields ) { + $term_ids = $terms; + } else { + $term_ids = wp_list_pluck( $terms, 'term_id' ); + } - return $terms; + update_termmeta_cache( $term_ids ); + } + + 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 ) ); + } + + /** + * Filters 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, $args ); + + /** + * Filters the terms for a given object or objects. + * + * The `$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 wp_get_object_terms() for details. + */ + return apply_filters( 'wp_get_object_terms', $terms, $object_ids, $taxonomies, $args ); } /** - * wp_insert_term() - Adds a new term to the database. Optionally marks it as an alias of an existing term. - * - * 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. - * - * 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. - * - * 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 '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. - * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 - * @uses $wpdb - * - * @uses do_action() Calls 'create_term' hook with the term id and taxonomy id as parameters. - * @uses do_action() Calls 'create_$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 int|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 + * Add a new term to the database. + * + * 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. + * + * 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. + * + * 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 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. + * + * @global wpdb $wpdb WordPress database abstraction object. + * + * @since 2.3.0 + * + * @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`, + * WP_Error otherwise. */ function wp_insert_term( $term, $taxonomy, $args = array() ) { global $wpdb; - if ( ! is_taxonomy($taxonomy) ) - return new WP_Error('invalid_taxonomy', __('Invalid taxonomy')); + if ( ! taxonomy_exists($taxonomy) ) { + return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) ); + } + /** + * Filters 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 ) { + return new WP_Error( 'invalid_term_id', __( 'Invalid term ID.' ) ); + } + 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, $defaults ); - if ( is_int($term) && 0 == $term ) - return new WP_Error('invalid_term_id', __('Invalid term ID')); + if ( $args['parent'] > 0 && ! term_exists( (int) $args['parent'] ) ) { + return new WP_Error( 'missing_parent', __( 'Parent term does not exist.' ) ); + } - $defaults = array( 'alias_of' => '', 'description' => '', 'parent' => 0, 'slug' => ''); - $args = wp_parse_args($args, $defaults); $args['name'] = $term; $args['taxonomy'] = $taxonomy; + + // Coerce null description to strings, to avoid database errors. + $args['description'] = (string) $args['description']; + $args = sanitize_term($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; - $wpdb->query( $wpdb->prepare( "UPDATE $wpdb->terms SET term_group = %d WHERE term_id = %d", $term_group, $alias->term_id ) ); + + wp_update_term( $alias->term_id, $taxonomy, array( + 'term_group' => $term_group, + ) ); + } + } + + /* + * Prevent the creation of terms with duplicate names at the same level of a taxonomy hierarchy, + * unless a unique slug has been explicitly provided. + */ + $name_matches = get_terms( $taxonomy, array( + 'name' => $name, + 'hide_empty' => false, + ) ); + + /* + * The `name` match in `get_terms()` doesn't differentiate accented characters, + * so we do a stricter comparison here. + */ + $name_match = null; + if ( $name_matches ) { + foreach ( $name_matches as $_match ) { + if ( strtolower( $name ) === strtolower( $_match->name ) ) { + $name_match = $_match; + break; + } + } + } + + if ( $name_match ) { + $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 { + return new WP_Error( 'term_exists', __( 'A term with the name provided already exists in this taxonomy.' ), $name_match->term_id ); + } } } - if ( ! $term_id = is_term($slug) ) { - 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) $wpdb->insert_id; - } else if ( is_taxonomy_hierarchical($taxonomy) && !empty($parent) ) { - // If the taxonomy supports hierarchy and the term has a parent, make the slug unique - // by incorporating parent slugs. - $slug = wp_unique_term_slug($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); + + /** 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' ) ); + + /** 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, $tt_id); - do_action("create_$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 = (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 ); + } - $term_id = apply_filters('term_id_filter', $term_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 ); + + /** + * Filters 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, $tt_id); - do_action("created_$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); } /** - * wp_set_object_terms() - Create Term and Taxonomy Relationships + * Create Term and Taxonomy Relationships. * - * Relates an object (post, link etc) to a term and taxonomy type. Creates the term and taxonomy - * relationship if it doesn't already exist. Creates a term if it doesn't exist (using the slug). + * Relates an object (post, link etc) to a term and taxonomy type. Creates the + * term and taxonomy relationship if it doesn't already exist. Creates a term if + * it doesn't exist (using the slug). * - * A relationship means that the term is grouped in or belongs to the taxonomy. A term has no - * meaning until it is given context by defining which taxonomy it exists under. + * A relationship means that the term is grouped in or belongs to the taxonomy. + * A term has no meaning until it is given context by defining which taxonomy it + * exists under. * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 - * @uses $wpdb + * @since 2.3.0 + * + * @global wpdb $wpdb The WordPress database abstraction object. * - * @param int $object_id The object to relate to. - * @param array|int|string $term The slug or id of the term. - * @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 + * @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 $append Optional. If false will delete difference of terms. Default false. + * @return array|WP_Error Term taxonomy IDs of the affected terms. */ -function wp_set_object_terms($object_id, $terms, $taxonomy, $append = false) { +function wp_set_object_terms( $object_id, $terms, $taxonomy, $append = false ) { global $wpdb; $object_id = (int) $object_id; - if ( ! is_taxonomy($taxonomy) ) - return new WP_Error('invalid_taxonomy', __('Invalid Taxonomy')); + if ( ! taxonomy_exists( $taxonomy ) ) { + return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) ); + } if ( !is_array($terms) ) $terms = array($terms); if ( ! $append ) - $old_terms = wp_get_object_terms($object_id, $taxonomy, 'fields=tt_ids'); + $old_tt_ids = wp_get_object_terms($object_id, $taxonomy, array('fields' => 'tt_ids', 'orderby' => 'none')); + else + $old_tt_ids = array(); $tt_ids = array(); $term_ids = array(); + $new_tt_ids = array(); - foreach ($terms as $term) { + foreach ( (array) $terms as $term) { if ( !strlen(trim($term)) ) continue; - if ( !$id = is_term($term, $taxonomy) ) - $id = wp_insert_term($term, $taxonomy); - if ( is_wp_error($id) ) - return $id; - $term_ids[] = $id['term_id']; - $id = $id['term_taxonomy_id']; - $tt_ids[] = $id; + if ( !$term_info = term_exists($term, $taxonomy) ) { + // Skip if a non-existent term ID is passed. + if ( is_int($term) ) + continue; + $term_info = wp_insert_term($term, $taxonomy); + } + if ( is_wp_error($term_info) ) + return $term_info; + $term_ids[] = $term_info['term_id']; + $tt_id = $term_info['term_taxonomy_id']; + $tt_ids[] = $tt_id; - 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, $id ) ) ) + 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; - $wpdb->insert( $wpdb->term_relationships, array( 'object_id' => $object_id, 'term_taxonomy_id' => $id ) ); + + /** + * 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_terms, $tt_ids); - if ( $delete_terms ) { - $in_delete_terms = "'" . implode("', '", $delete_terms) . "'"; - $wpdb->query("DELETE FROM $wpdb->term_relationships WHERE object_id = '$object_id' AND term_taxonomy_id IN ($in_delete_terms)"); - wp_update_term_count($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 $remove; + } } } @@ -1304,126 +2554,281 @@ function wp_set_object_terms($object_id, $terms, $taxonomy, $append = false) { if ( ! $append && isset($t->sort) && $t->sort ) { $values = array(); $term_order = 0; - $final_term_ids = wp_get_object_terms($object_id, $taxonomy, 'fields=tt_ids'); - foreach ( $term_ids as $term_id ) - if ( in_array($term_id, $final_term_ids) ) - $values[] = $wpdb->prepare( "(%d, %d, %d)", $object_id, $term_id, ++$term_order); + $final_tt_ids = wp_get_object_terms($object_id, $taxonomy, array('fields' => 'tt_ids')); + foreach ( $tt_ids as $tt_id ) + if ( in_array($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 ); } + 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; } /** - * wp_unique_term_slug() - Will make slug unique, if it isn't already + * Add term(s) associated with a given object. * - * 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. + * @since 3.6.0 * - * The way this works is that if the taxonomy that the term belongs to is heirarchical - * 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. + * @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 Term taxonomy IDs of the affected terms. + */ +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. * - * The only purpose for $term is for appending a parent, if one exists. + * @since 3.6.0 * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 - * @uses $wpdb + * @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 too - * @return string Will return a true unique slug. + * @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 $taxonomy Taxonomy name. + * @return bool|WP_Error True on success, false or WP_Error on failure. */ -function wp_unique_term_slug($slug, $term) { +function wp_remove_object_terms( $object_id, $terms, $taxonomy ) { global $wpdb; - // If the taxonomy supports hierarchy and the term has a parent, make the slug unique - // by incorporating parent slugs. - if ( is_taxonomy_hierarchical($term->taxonomy) && !empty($term->parent) ) { - $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 .= '-' . $parent_term->slug; - if ( empty($parent_term->parent) ) - break; - $the_parent = $parent_term->parent; - } + $object_id = (int) $object_id; + + if ( ! taxonomy_exists( $taxonomy ) ) { + return new WP_Error( 'invalid_taxonomy', __( 'Invalid taxonomy.' ) ); } - // If we didn't get a unique slug, try appending a number to make it unique. - if ( !empty($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 ( ! 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 ( $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; + 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 ) ); + + wp_cache_delete( $object_id, $taxonomy . '_relationships' ); + + /** + * 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 $slug; + return false; } /** - * wp_update_term() - Update term based on arguments provided - * - * The $args will indiscriminately override all values with the same field name. Care - * must be taken to not override important information need to update or update will - * fail (or perhaps create a new term, neither would be acceptable). + * Will make slug unique, if it isn't already. * - * Defaults will set 'alias_of', 'description', 'parent', and 'slug' if not defined - * in $args already. + * The `$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. * - * 'alias_of' will create a term group, if it doesn't already exist, and update it for - * the $term. + * The way this works is that if the taxonomy that the term belongs to is + * hierarchical and has a parent, it will append that parent to the $slug. * - * If the 'slug' argument in $args is missing, then the 'name' in $args will be used. - * It should also be noted that if you set 'slug' and it isn't unique then a WP_Error - * will be passed back. If you don't pass any slug, then a unique one will be created - * for you. + * If that still doesn't return an unique slug, then it try to append a number + * until it finds a number that is truly unique. * - * For what can be overrode in $args, check the term scheme can contain and stay away - * from the term keys. + * The only purpose for `$term` is for appending a parent, if one exists. * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 + * @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 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 - * @return array|WP_Error Returns Term ID and Taxonomy Term ID + * @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_update_term( $term, $taxonomy, $args = array() ) { +function wp_unique_term_slug( $slug, $term ) { global $wpdb; - if ( ! is_taxonomy($taxonomy) ) - return new WP_Error('invalid_taxonomy', __('Invalid taxonomy')); + $needs_suffix = true; + $original_slug = $slug; - $term_id = (int) $term; - - // First, get all of the original args - $term = get_term ($term_id, $taxonomy, ARRAY_A); + // 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; + } - // Escape data pulled from DB. - $term = add_magic_quotes($term); + /* + * 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; + $parent_suffix .= '-' . $parent_term->slug; + if ( ! term_exists( $slug . $parent_suffix ) ) { + break; + } + + if ( empty($parent_term->parent) ) + break; + $the_parent = $parent_term->parent; + } + } + + // If we didn't get a unique slug, try appending a number to make it unique. + + /** + * Filters 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; + } + } + } + + /** + * Filters 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 ); +} + +/** + * Update term based on arguments provided. + * + * The $args will indiscriminately override all values with the same field name. + * Care must be taken to not override important information need to update or + * update will fail (or perhaps create a new term, neither would be acceptable). + * + * Defaults will set 'alias_of', 'description', 'parent', and 'slug' if not + * defined in $args already. + * + * 'alias_of' will create a term group, if it doesn't already exist, and update + * it for the $term. + * + * If the 'slug' argument in $args is missing, then the 'name' in $args will be + * used. It should also be noted that if you set 'slug' and it isn't unique then + * a WP_Error will be passed back. If you don't pass any slug, then a unique one + * will be created for you. + * + * For what can be overrode in `$args`, check the term scheme can contain and stay + * away from the term keys. + * + * @since 2.3.0 + * + * @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 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.' ) ); + } + + $term_id = (int) $term_id; + + // First, get all of the original args + $term = get_term( $term_id, $taxonomy ); + + if ( is_wp_error( $term ) ) { + return $term; + } + + if ( ! $term ) { + return new WP_Error( 'invalid_term', __( 'Empty Term' ) ); + } + + $term = (array) $term->data; + + // Escape data pulled from DB. + $term = wp_slash( $term ); // Merge old and new args with new args overwriting old ones. $args = array_merge($term, $args); @@ -1431,102 +2836,237 @@ function wp_update_term( $term, $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; - $wpdb->update( $wpdb->terms, compact('term_group'), array( 'term_id' => $alias->term_id ) ); + + wp_update_term( $alias->term_id, $taxonomy, array( + 'term_group' => $term_group, + ) ); } + + $parsed_args['term_group'] = $term_group; } + /** + * Filters 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) ) + if ( $empty_slug || ( $parent != $term['parent']) ) $slug = wp_unique_term_slug($slug, (object) $args); else - return new WP_Error('duplicate_term_slug', sprintf(__('The slug "%s" is already in use by another term'), $slug)); + return new WP_Error('duplicate_term_slug', sprintf(__('The slug “%s” is already in use by another term'), $slug)); } - $wpdb->update($wpdb->terms, compact( 'name', 'slug', 'term_group' ), compact( 'term_id' ) ); + $tt_id = (int) $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' ) ); } - $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 ) ); - do_action("edit_term", $term_id, $tt_id); - do_action("edit_$taxonomy", $term_id, $tt_id); - - $term_id = apply_filters('term_id_filter', $term_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 ); + + /** + * 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 ); + + /** 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, $tt_id); - do_action("edited_$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' => $tt_id); } -// enable or disable term count deferring -// if no value is supplied, the current value of the defer setting is returned -function wp_defer_term_counting($defer=NULL) { +/** + * Enable or disable term counting. + * + * @since 2.5.0 + * + * @staticvar bool $_defer + * + * @param bool $defer Optional. Enable if true, disable if false. + * @return bool Whether term counting is enabled or disabled. + */ +function wp_defer_term_counting($defer=null) { static $_defer = false; if ( is_bool($defer) ) { $_defer = $defer; // flush any deferred counts if ( !$defer ) - wp_update_term_count( NULL, NULL, true ); + wp_update_term_count( null, null, true ); } return $_defer; } /** - * wp_update_term_count() - Updates the amount of terms in taxonomy + * Updates the amount of terms in taxonomy. * - * If there is a taxonomy callback applyed, then it will be called for updating the count. + * 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. + * 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 - * @uses $wpdb + * @since 2.3.0 * - * @param int|array $terms The 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. + * @param bool $do_deferred Whether to flush the deferred term counts too. Default false. * @return bool If no terms will return false, and if successful will return true. */ -function wp_update_term_count( $terms, $taxonomy, $do_deferred=false ) { +function wp_update_term_count( $terms, $taxonomy, $do_deferred = false ) { static $_deferred = array(); if ( $do_deferred ) { - foreach ( array_keys($_deferred) as $tax ) { + foreach ( (array) array_keys($_deferred) as $tax ) { wp_update_term_count_now( $_deferred[$tax], $tax ); unset( $_deferred[$tax] ); } @@ -1548,24 +3088,38 @@ function wp_update_term_count( $terms, $taxonomy, $do_deferred=false ) { return wp_update_term_count_now( $terms, $taxonomy ); } +/** + * Perform term count update immediately. + * + * @since 2.5.0 + * + * @param array $terms The term_taxonomy_id of terms to update. + * @param string $taxonomy The context of the term. + * @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, $terms); + call_user_func($taxonomy->update_count_callback, $terms, $taxonomy); } else { - // Default count updater - foreach ($terms as $term) { - $count = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $term) ); - $wpdb->update( $wpdb->term_taxonomy, compact( 'count' ), array( 'term_taxonomy_id' => $term ) ); + $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); + clean_term_cache($terms, '', false); return true; } @@ -1575,46 +3129,70 @@ function wp_update_term_count_now( $terms, $taxonomy ) { // /** - * clean_object_term_cache() - Removes the taxonomy relationship to terms from the 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 $object_type for the deletion to take place. + * Will remove the entire taxonomy relationship containing term `$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 + * @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. + * @global bool $_wp_suspend_cache_invalidation * - * @param int|array $object_ids Single or list of term object ID(s) - * @param array|string $object_type The taxonomy object type + * @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 $object_type The taxonomy object type. */ function clean_object_term_cache($object_ids, $object_type) { + global $_wp_suspend_cache_invalidation; + + if ( ! empty( $_wp_suspend_cache_invalidation ) ) { + return; + } + if ( !is_array($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 ); } /** - * clean_term_cache() - Will remove all of the term ids from the cache + * Will remove all of the term ids from the cache. * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 - * @uses $wpdb + * @since 2.3.0 * - * @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. + * @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 = '') { - global $wpdb; +function clean_term_cache($ids, $taxonomy = '', $clean_taxonomy = true) { + global $wpdb, $_wp_suspend_cache_invalidation; + + if ( ! empty( $_wp_suspend_cache_invalidation ) ) { + return; + } if ( !is_array($ids) ) $ids = array($ids); @@ -1622,71 +3200,107 @@ function clean_term_cache($ids, $taxonomy = '') { $taxonomies = array(); // If no taxonomy, assume tt_ids. if ( empty($taxonomy) ) { - $tt_ids = implode(', ', $ids); + $tt_ids = array_map('intval', $ids); + $tt_ids = implode(', ', $tt_ids); $terms = $wpdb->get_results("SELECT term_id, taxonomy FROM $wpdb->term_taxonomy WHERE term_taxonomy_id IN ($tt_ids)"); + $ids = array(); foreach ( (array) $terms as $term ) { $taxonomies[] = $term->taxonomy; - wp_cache_delete($term->term_id, $term->taxonomy); + $ids[] = $term->term_id; + wp_cache_delete( $term->term_id, 'terms' ); } $taxonomies = array_unique($taxonomies); } else { - foreach ( $ids as $id ) { - wp_cache_delete($id, $taxonomy); - } $taxonomies = array($taxonomy); + foreach ( $taxonomies as $taxonomy ) { + foreach ( $ids as $id ) { + wp_cache_delete( $id, 'terms' ); + } + } } foreach ( $taxonomies as $taxonomy ) { - wp_cache_delete('all_ids', $taxonomy); - wp_cache_delete('get', $taxonomy); - delete_option("{$taxonomy}_children"); - } + if ( $clean_taxonomy ) { + wp_cache_delete('all_ids', $taxonomy); + wp_cache_delete('get', $taxonomy); + delete_option("{$taxonomy}_children"); + // Regenerate {$taxonomy}_children + _get_term_hierarchy($taxonomy); + } - wp_cache_delete('get_terms', 'terms'); + /** + * Fires once after each taxonomy's term cache has been cleaned. + * + * @since 2.5.0 + * @since 4.5.0 Added the `$clean_taxonomy` parameter. + * + * @param array $ids An array of term IDs. + * @param string $taxonomy Taxonomy slug. + * @param bool $clean_taxonomy Whether or not to clean taxonomy-wide caches + */ + do_action( 'clean_term_cache', $ids, $taxonomy, $clean_taxonomy ); + } - do_action('clean_term_cache', $ids, $taxonomy); + wp_cache_set( 'last_changed', microtime(), 'terms' ); } /** - * get_object_term_cache() - Retrieves the taxonomy relationship to the term object id. + * Retrieves the taxonomy relationship to the term object id. * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 + * Upstream functions (like get_the_terms() and is_object_in_term()) are + * responsible for populating the object-term relationship cache. The current + * function only fetches relationship data that is already in the cache. * - * @uses wp_cache_get() Retrieves taxonomy relationship from cache + * @since 2.3.0 * - * @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 $taxonomy Taxonomy name. + * @return bool|array Array of `WP_Term` objects, if cached False if cache is empty for `$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 ) { + $_term_ids = wp_cache_get( $id, "{$taxonomy}_relationships" ); + + // We leave the priming of relationship caches to upstream functions. + if ( false === $_term_ids ) { + return false; + } + + // Backward compatibility for if a plugin is putting objects into the cache, rather than IDs. + $term_ids = array(); + foreach ( $_term_ids as $term_id ) { + if ( is_numeric( $term_id ) ) { + $term_ids[] = intval( $term_id ); + } elseif ( isset( $term_id->term_id ) ) { + $term_ids[] = intval( $term_id->term_id ); + } + } + + // Fill the term objects. + _prime_term_caches( $term_ids ); + + $terms = array(); + foreach ( $term_ids as $term_id ) { + $terms[] = wp_cache_get( $term_id, 'terms' ); + } + + return array_map( 'get_term', $terms ); } /** - * update_object_term_cache() - Updates the cache for Term ID(s) + * Updates the cache for the given term object ID(s). * - * Will only update the cache for terms not already cached. + * 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. * - * The $object_ids expects that the ids be separated by commas, if it is - * a string. + * Caches will only be updated for terms not already cached. * - * 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. + * @since 2.3.0 * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 - * @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) ) @@ -1712,14 +3326,19 @@ function update_object_term_cache($object_ids, $object_type) { if ( empty( $ids ) ) return false; - $terms = wp_get_object_terms($ids, $taxonomies, 'fields=all_with_object_id'); + $terms = wp_get_object_terms( $ids, $taxonomies, array( + 'fields' => 'all_with_object_id', + 'orderby' => 'name', + 'update_term_meta_cache' => false, + ) ); $object_terms = array(); - foreach ( (array) $terms as $term ) - $object_terms[$term->object_id][$term->taxonomy][$term->term_id] = $term; + foreach ( (array) $terms as $term ) { + $object_terms[ $term->object_id ][ $term->taxonomy ][] = $term->term_id; + } 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(); @@ -1730,28 +3349,28 @@ 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" ); } } } /** - * update_term_cache() - Updates Terms to Taxonomy in cache. + * Updates Terms to Taxonomy in cache. * - * @package WordPress - * @subpackage Taxonomy - * @since 2.3 + * @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 = '') { - foreach ( $terms as $term ) { - $term_taxonomy = $taxonomy; - if ( empty($term_taxonomy) ) - $term_taxonomy = $term->taxonomy; +function update_term_cache( $terms, $taxonomy = '' ) { + foreach ( (array) $terms as $term ) { + // Create a copy in case the array was passed by reference. + $_term = clone $term; - wp_cache_add($term->term_id, $term, $term_taxonomy); + // Object ID should not be cached. + unset( $_term->object_id ); + + wp_cache_add( $term->term_id, $_term, 'terms' ); } } @@ -1760,31 +3379,26 @@ function update_term_cache($terms, $taxonomy = '') { // /** - * _get_term_hierarchy() - Retrieves children of taxonomy - * - * @package WordPress - * @subpackage Taxonomy - * @access private - * @since 2.3 + * Retrieves children of taxonomy as Term IDs. * - * @uses update_option() Stores all of the children in "$taxonomy_children" option. - * That is the name of the taxonomy, immediately followed by '_children'. + * @ignore + * @since 2.3.0 * - * @param string $taxonomy Taxonomy Name - * @return array Empty if $taxonomy isn't hierarachical or returns children. + * @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"); + if ( is_array($children) ) return $children; - $children = array(); - $terms = get_terms($taxonomy, 'get=all'); - foreach ( $terms as $term ) { - if ( $term->parent > 0 ) - $children[$term->parent][] = $term->term_id; + $terms = get_terms($taxonomy, array('get' => 'all', 'orderby' => 'id', 'fields' => 'id=>parent')); + foreach ( $terms as $term_id => $parent ) { + if ( $parent > 0 ) + $children[$parent][] = $term_id; } update_option("{$taxonomy}_children", $children); @@ -1792,22 +3406,25 @@ function _get_term_hierarchy($taxonomy) { } /** - * _get_term_children() - Get array of child terms + * Get the subset of $terms that are descendants of $term_id. * - * If $terms is an array of objects, then objects will returned from the function. - * If $terms is an array of IDs, then an array of ids of children will be returned. + * If `$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 - * - * @param int $term_id Look for this Term ID in $terms - * @param array $terms List of Term IDs - * @param string $taxonomy Term Context - * @return array Empty if $terms is empty else returns full list of child terms. + * @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. + * @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 $empty_array; @@ -1818,7 +3435,12 @@ function &_get_term_children($term_id, $terms, $taxonomy) { if ( ( 0 != $term_id ) && ! isset($has_children[$term_id]) ) return $empty_array; - foreach ( $terms as $term ) { + // 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) ) { $term = get_term($term, $taxonomy); @@ -1827,8 +3449,10 @@ function &_get_term_children($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 ( $use_id ) @@ -1839,7 +3463,9 @@ function &_get_term_children($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, $children); } } @@ -1848,26 +3474,24 @@ function &_get_term_children($term_id, $terms, $taxonomy) { } /** - * _pad_term_counts() - Add count of children to parent count + * 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 + * 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 - * @uses $wpdb + * @since 2.3.0 * - * @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 objects, 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 post categories. - if ( 'category' != $taxonomy ) + // This function only works for hierarchical taxonomies like post categories. + if ( !is_taxonomy_hierarchical( $taxonomy ) ) return; $term_hier = _get_term_hierarchy($taxonomy); @@ -1876,107 +3500,668 @@ function _pad_term_counts(&$terms, $taxonomy) { return; $term_items = array(); + $terms_by_id = array(); + $term_ids = array(); - foreach ( $terms as $key => $term ) { + 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 - $results = $wpdb->get_results("SELECT object_id, term_taxonomy_id FROM $wpdb->term_relationships INNER JOIN $wpdb->posts ON object_id = ID WHERE term_taxonomy_id IN (".join(',', array_keys($term_ids)).") AND post_type = 'post' AND post_status = 'publish'"); + // 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'"); foreach ( $results as $row ) { $id = $term_ids[$row->term_taxonomy_id]; - ++$term_items[$id][$row->object_id]; + $term_items[$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]) ) - foreach ( $term_items[$term_id] as $item_id => $touches ) - ++$term_items[$parent][$item_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); } +/** + * Adds any terms from the given IDs to the cache that do not already exist in cache. + * + * @since 4.6.0 + * @access private + * + * @global wpdb $wpdb WordPress database abstraction object. + * + * @param array $term_ids Array of term IDs. + * @param bool $update_meta_cache Optional. Whether to update the meta cache. Default true. + */ +function _prime_term_caches( $term_ids, $update_meta_cache = true ) { + global $wpdb; + + $non_cached_ids = _get_non_cached_ids( $term_ids, 'terms' ); + if ( ! empty( $non_cached_ids ) ) { + $fresh_terms = $wpdb->get_results( sprintf( "SELECT t.*, tt.* FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE t.term_id IN (%s)", join( ",", array_map( 'intval', $non_cached_ids ) ) ) ); + + update_term_cache( $fresh_terms, $update_meta_cache ); + + if ( $update_meta_cache ) { + update_termmeta_cache( $non_cached_ids ); + } + } +} + // // Default callbacks // /** - * _update_post_term_count() - Will update term count based on posts + * Will update term count based on object types of the current taxonomy. * - * Private function for the default callback for post_tag and category taxonomies. + * Private function for the default callback for post_tag and category + * taxonomies. * - * @package WordPress - * @subpackage Taxonomy * @access private - * @since 2.3 - * @uses $wpdb + * @since 2.3.0 * - * @param array $terms List of Term IDs + * @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 ) { +function _update_post_term_count( $terms, $taxonomy ) { global $wpdb; - foreach ( $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 = 'post' AND term_taxonomy_id = %d", $term ) ); + $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 ); } } /** - * get_term_link() - Generates a permalink for a taxonomy term archive + * 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 object|int|string $term - * @param string $taxonomy - * @return string HTML link to taxonomy term archive + * @param array $terms List of term taxonomy IDs. + * @param object $taxonomy Current taxonomy object of terms. */ -function get_term_link( $term, $taxonomy ) { - global $wp_rewrite; +function _update_generic_term_count( $terms, $taxonomy ) { + global $wpdb; - // use legacy functions for core taxonomies until they are fully plugged in - if ( $taxonomy == 'category' ) - return get_category_link($term); - if ( $taxonomy == 'post_tag' ) - return get_tag_link($term); + foreach ( (array) $terms as $term ) { + $count = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships WHERE term_taxonomy_id = %d", $term ) ); - $termlink = $wp_rewrite->get_extra_permastruct($taxonomy); + /** 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, $taxonomy->name ); + } +} + +/** + * Create a new term for a term_taxonomy item that currently shares its term + * with another term_taxonomy. + * + * @ignore + * @since 4.2.0 + * @since 4.3.0 Introduced `$record` parameter. Also, `$term_id` and + * `$term_taxonomy_id` can now accept objects. + * + * @global wpdb $wpdb WordPress database abstraction object. + * + * @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 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 ); + } + + // If we've just split the final shared term, set the "finished" flag. + $shared_terms_exist = $wpdb->get_results( + "SELECT tt.term_id, t.*, count(*) as term_tt_count FROM {$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 1" + ); + if ( ! $shared_terms_exist ) { + update_option( 'finished_splitting_shared_terms', true ); + } + + /** + * 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 WordPress database abstraction object. + * + * @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 + * + * @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; +} + +/** + * Determine whether a term is shared between multiple taxonomies. + * + * Shared taxonomy terms began to be split in 4.3, but failed cron tasks or other delays in upgrade routines may cause + * shared terms to remain. + * + * @since 4.4.0 + * + * @param int $term_id + * @return bool + */ +function wp_term_is_shared( $term_id ) { + global $wpdb; + + if ( get_option( 'finished_splitting_shared_terms' ) ) { + return false; + } + + $tt_count = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_taxonomy WHERE term_id = %d", $term_id ) ); + + return $tt_count > 1; +} + +/** + * Generate a permalink for a taxonomy term archive. + * + * @since 2.5.0 + * + * @global WP_Rewrite $wp_rewrite + * + * @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 = '' ) { + 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, $taxonomy ); } } + + if ( !is_object($term) ) + $term = new WP_Error('invalid_term', __('Empty Term')); + if ( is_wp_error( $term ) ) return $term; + $taxonomy = $term->taxonomy; + + $termlink = $wp_rewrite->get_extra_permastruct($taxonomy); + $slug = $term->slug; + $t = get_taxonomy($taxonomy); if ( empty($termlink) ) { - $file = get_option('home') . '/'; - $t = get_taxonomy($taxonomy); - if ( $t->query_var ) - $termlink = "$file?$t->query_var=$slug"; + if ( 'category' == $taxonomy ) + $termlink = '?cat=' . $term->term_id; + elseif ( $t->query_var ) + $termlink = "?$t->query_var=$slug"; else - $termlink = "$file?taxonomy=$taxonomy&term=$slug"; + $termlink = "?taxonomy=$taxonomy&term=$slug"; + $termlink = home_url($termlink); } else { - $termlink = str_replace("%$taxonomy%", $slug, $termlink); - $termlink = get_option('home') . user_trailingslashit($termlink, 'category'); + if ( $t->rewrite['hierarchical'] ) { + $hierarchical_slugs = array(); + $ancestors = get_ancestors( $term->term_id, $taxonomy, 'taxonomy' ); + foreach ( (array)$ancestors as $ancestor ) { + $ancestor_term = get_term($ancestor, $taxonomy); + $hierarchical_slugs[] = $ancestor_term->slug; + } + $hierarchical_slugs = array_reverse($hierarchical_slugs); + $hierarchical_slugs[] = $slug; + $termlink = str_replace("%$taxonomy%", implode('/', $hierarchical_slugs), $termlink); + } else { + $termlink = str_replace("%$taxonomy%", $slug, $termlink); + } + $termlink = home_url( user_trailingslashit($termlink, 'category') ); + } + // Back Compat filters. + if ( 'post_tag' == $taxonomy ) { + + /** + * Filters 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 ) { + + /** + * Filters 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); + + /** + * Filters 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, $taxonomy ); } -function the_taxonomies($args = array()) { +/** + * Display the taxonomies of a post with available options. + * + * This function can be used within the loop to display the taxonomies for a + * post without specifying the Post ID. You can also use it outside the Loop to + * display the taxonomies for a specific post. + * + * @since 2.5.0 + * + * @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. + * } + */ +function the_taxonomies( $args = array() ) { $defaults = array( 'post' => 0, 'before' => '', @@ -1985,52 +4170,276 @@ function the_taxonomies($args = array()) { ); $r = wp_parse_args( $args, $defaults ); - extract( $r, EXTR_SKIP ); - echo $before . join($sep, get_the_taxonomies($post)) . $after; + echo $r['before'] . join( $r['sep'], get_the_taxonomies( $r['post'], $r ) ) . $r['after']; } -function get_the_taxonomies($post = 0) { - if ( is_int($post) ) - $post =& get_post($post); - elseif ( !is_object($post) ) - $post =& $GLOBALS['post']; +/** + * Retrieve all taxonomies associated with a post. + * + * This function can be used within the loop. It will also return an array of + * the taxonomies with links to the taxonomy and name. + * + * @since 2.5.0 + * + * @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() ) { + $post = get_post( $post ); + + $args = wp_parse_args( $args, array( + /* translators: %s: taxonomy label, %l: list of terms formatted as per $term_template */ + 'template' => __( '%s: %l.' ), + 'term_template' => '%2$s', + ) ); $taxonomies = array(); - if ( !$post ) + if ( ! $post ) { return $taxonomies; + } - $template = apply_filters('taxonomy_template', '%s: %l.'); - - foreach ( get_object_taxonomies($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 $taxonomies; } -function get_post_taxonomies($post = 0) { - $post =& get_post($post); +/** + * Retrieve all taxonomies of a post with just the names. + * + * @since 2.5.0 + * + * @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( $post ); return get_object_taxonomies($post); } -?> +/** + * Determine if the given object is associated with any of the given terms. + * + * The given terms are checked against the object's terms' term_ids, names and slugs. + * Terms given as integers will only be checked against the object's terms' term_ids. + * If no terms are given, determines if object is associated with any terms in the given taxonomy. + * + * @since 2.7.0 + * + * @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 ( false === $object_terms ) { + $object_terms = wp_get_object_terms( $object_id, $taxonomy, array( 'update_term_meta_cache' => false ) ); + if ( is_wp_error( $object_terms ) ) { + return $object_terms; + } + + wp_cache_set( $object_id, wp_list_pluck( $object_terms, 'term_id' ), "{$taxonomy}_relationships" ); + } + + if ( is_wp_error( $object_terms ) ) + return $object_terms; + if ( empty( $object_terms ) ) + return false; + if ( empty( $terms ) ) + return ( !empty( $object_terms ) ); + + $terms = (array) $terms; + + if ( $ints = array_filter( $terms, 'is_int' ) ) + $strs = array_diff( $terms, $ints ); + else + $strs =& $terms; + + foreach ( $object_terms as $object_term ) { + // If term is an int, check against term_ids only. + if ( $ints && in_array( $object_term->term_id, $ints ) ) { + return true; + } + + if ( $strs ) { + // 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; + } + } + + return false; +} + +/** + * Determine if the given object type is associated with the given taxonomy. + * + * @since 3.0.0 + * + * @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 ) ) { + return false; + } + return in_array( $taxonomy, $taxonomies ); +} + +/** + * Get an array of ancestor IDs for a given object. + * + * @since 3.1.0 + * @since 4.1.0 Introduced the `$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 = '', $resource_type = '' ) { + $object_id = (int) $object_id; + + $ancestors = array(); + + if ( empty( $object_id ) ) { + + /** 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 ( '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 ( 'post_type' === $resource_type ) { + $ancestors = get_post_ancestors($object_id); + } + + /** + * Filters 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. + * + * @since 3.1.0 + * + * @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 ) ) { + return false; + } + return (int) $term->parent; +} + +/** + * Checks the given subset of the term hierarchy for hierarchy loops. + * Prevents loops from forming and breaks those that it finds. + * + * Attached to the {@see 'wp_update_term_parent'} filter. + * + * @since 3.1.0 + * + * @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. + */ +function wp_check_term_hierarchy_for_loops( $parent, $term_id, $taxonomy ) { + // Nothing fancy here - bail + if ( !$parent ) + return 0; + + // Can't be its own parent. + if ( $parent == $term_id ) + return 0; + + // Now look for larger loops. + if ( !$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. + if ( isset( $loop[$term_id] ) ) + return 0; + + // 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 ) ); + + return $parent; +}