<?php
/**
- * Category Template Tags and API.
+ * Taxonomy API: Core category-specific template tags
*
* @package WordPress
* @subpackage Template
+ * @since 1.2.0
*/
/**
/**
* Retrieve post categories.
*
+ * This tag may be used outside The Loop by passing a post id as the parameter.
+ *
+ * Note: This function only returns results from the default "category" taxonomy.
+ * For custom taxonomies use get_the_terms().
+ *
* @since 0.71
*
* @param int $id Optional, default to current post ID. The post ID.
- * @return array
+ * @return array Array of objects, one for each category assigned to the post.
*/
function get_the_category( $id = false ) {
$categories = get_the_terms( $id, 'category' );
* Filter the array of categories to return for a post.
*
* @since 3.1.0
+ * @since 4.4.0 Added `$id` parameter.
*
* @param array $categories An array of categories to return for the post.
+ * @param int $id ID of the post.
*/
- return apply_filters( 'get_the_categories', $categories );
+ return apply_filters( 'get_the_categories', $categories, $id );
}
/**
*
* @since 1.5.1
*
+ * @global WP_Rewrite $wp_rewrite
+ *
* @param string $separator Optional, default is empty string. Separator for between the categories.
* @param string $parents Optional. How to display the parents.
* @param int $post_id Optional. Post ID to retrieve categories.
return apply_filters( 'the_category', '', $separator, $parents );
}
- $categories = get_the_category( $post_id );
+ /**
+ * Filter the categories before building the category list.
+ *
+ * @since 4.4.0
+ *
+ * @param array $categories An array of the post's categories.
+ * @param int|bool $post_id ID of the post we're retrieving categories for. When `false`, we assume the
+ * current post in the loop.
+ */
+ $categories = apply_filters( 'the_category_list', get_the_category( $post_id ), $post_id );
+
if ( empty( $categories ) ) {
/** This filter is documented in wp-includes/category-template.php */
return apply_filters( 'the_category', __( 'Uncategorized' ), $separator, $parents );
// Back compat.
if ( isset( $args['type'] ) && 'link' == $args['type'] ) {
- _deprecated_argument( __FUNCTION__, '3.0', '' );
+ /* translators: 1: "type => link", 2: "taxonomy => link_category" alternative */
+ _deprecated_argument( __FUNCTION__, '3.0',
+ sprintf( __( '%1$s is deprecated. Use %2$s instead.' ),
+ '<code>type => link</code>',
+ '<code>taxonomy => link_category</code>'
+ )
+ );
$args['taxonomy'] = 'link_category';
}
/**
* Display or retrieve the HTML list of categories.
*
- * The list of arguments is below:
- * 'show_option_all' (string) - Text to display for showing all categories.
- * 'orderby' (string) default is 'ID' - What column to use for ordering the
- * categories.
- * 'order' (string) default is 'ASC' - What direction to order categories.
- * 'show_count' (bool|int) default is 0 - Whether to show how many posts are
- * in the category.
- * 'hide_empty' (bool|int) default is 1 - Whether to hide categories that
- * don't have any posts attached to them.
- * 'use_desc_for_title' (bool|int) default is 1 - Whether to use the
- * category description as the title attribute.
- * 'feed' - See {@link get_categories()}.
- * 'feed_type' - See {@link get_categories()}.
- * 'feed_image' - See {@link get_categories()}.
- * 'child_of' (int) default is 0 - See {@link get_categories()}.
- * 'exclude' (string) - See {@link get_categories()}.
- * 'exclude_tree' (string) - See {@link get_categories()}.
- * 'echo' (bool|int) default is 1 - Whether to display or retrieve content.
- * 'current_category' (int) - See {@link get_categories()}.
- * 'hierarchical' (bool) - See {@link get_categories()}.
- * 'title_li' (string) - See {@link get_categories()}.
- * 'depth' (int) - The max depth.
- *
* @since 2.1.0
+ * @since 4.4.0 Introduced the `hide_title_if_empty` and `separator` arguments. The `current_category` argument was modified to
+ * optionally accept an array of values.
*
- * @param string|array $args Optional. Override default arguments.
- * @return false|null|string HTML content only if 'echo' argument is 0.
+ * @param string|array $args {
+ * Array of optional arguments.
+ *
+ * @type string $show_option_all Text to display for showing all categories. Default empty string.
+ * @type string $show_option_none Text to display for the 'no categories' option.
+ * Default 'No categories'.
+ * @type string $orderby The column to use for ordering categories. Default 'ID'.
+ * @type string $order Which direction to order categories. Accepts 'ASC' or 'DESC'.
+ * Default 'ASC'.
+ * @type bool|int $show_count Whether to show how many posts are in the category. Default 0.
+ * @type bool|int $hide_empty Whether to hide categories that don't have any posts attached to them.
+ * Default 1.
+ * @type bool|int $use_desc_for_title Whether to use the category description as the title attribute.
+ * Default 1.
+ * @type string $feed Text to use for the feed link. Default 'Feed for all posts filed
+ * under [cat name]'.
+ * @type string $feed_type Feed type. Used to build feed link. See {@link get_term_feed_link()}.
+ * Default empty string (default feed).
+ * @type string $feed_image URL of an image to use for the feed link. Default empty string.
+ * @type int $child_of Term ID to retrieve child terms of. See {@link get_terms()}. Default 0.
+ * @type array|string $exclude Array or comma/space-separated string of term IDs to exclude.
+ * If `$hierarchical` is true, descendants of `$exclude` terms will also
+ * be excluded; see `$exclude_tree`. See {@link get_terms()}.
+ * Default empty string.
+ * @type array|string $exclude_tree Array or comma/space-separated string of term IDs to exclude, along
+ * with their descendants. See {@link get_terms()}. Default empty string.
+ * @type bool|int $echo True to echo markup, false to return it. Default 1.
+ * @type int|array $current_category ID of category, or array of IDs of categories, that should get the
+ * 'current-cat' class. Default 0.
+ * @type bool $hierarchical Whether to include terms that have non-empty descendants.
+ * See {@link get_terms()}. Default true.
+ * @type string $title_li Text to use for the list title `<li>` element. Pass an empty string
+ * to disable. Default 'Categories'.
+ * @type bool $hide_title_if_empty Whether to hide the `$title_li` element if there are no terms in
+ * the list. Default false (title will always be shown).
+ * @type int $depth Category depth. Used for tab indentation. Default 0.
+ * @type string $taxonomy Taxonomy name. Default 'category'.
+ * }
+ * @return false|string HTML content only if 'echo' argument is 0.
*/
function wp_list_categories( $args = '' ) {
$defaults = array(
'feed_image' => '', 'exclude' => '',
'exclude_tree' => '', 'current_category' => 0,
'hierarchical' => true, 'title_li' => __( 'Categories' ),
+ 'hide_title_if_empty' => false,
'echo' => 1, 'depth' => 0,
+ 'separator' => '<br />',
'taxonomy' => 'category'
);
if ( !isset( $r['pad_counts'] ) && $r['show_count'] && $r['hierarchical'] )
$r['pad_counts'] = true;
+ // Descendants of exclusions should be excluded too.
if ( true == $r['hierarchical'] ) {
- $r['exclude_tree'] = $r['exclude'];
+ $exclude_tree = array();
+
+ if ( $r['exclude_tree'] ) {
+ $exclude_tree = array_merge( $exclude_tree, wp_parse_id_list( $r['exclude_tree'] ) );
+ }
+
+ if ( $r['exclude'] ) {
+ $exclude_tree = array_merge( $exclude_tree, wp_parse_id_list( $r['exclude'] ) );
+ }
+
+ $r['exclude_tree'] = $exclude_tree;
$r['exclude'] = '';
}
$categories = get_categories( $r );
$output = '';
- if ( $r['title_li'] && 'list' == $r['style'] ) {
+ if ( $r['title_li'] && 'list' == $r['style'] && ( ! empty( $categories ) || ! $r['hide_title_if_empty'] ) ) {
$output = '<li class="' . esc_attr( $r['class'] ) . '">' . $r['title_li'] . '<ul>';
}
if ( empty( $categories ) ) {
}
} else {
if ( ! empty( $show_option_all ) ) {
- $posts_page = ( 'page' == get_option( 'show_on_front' ) && get_option( 'page_for_posts' ) ) ? get_permalink( get_option( 'page_for_posts' ) ) : home_url( '/' );
+
+ $posts_page = '';
+
+ // For taxonomies that belong only to custom post types, point to a valid archive.
+ $taxonomy_object = get_taxonomy( $r['taxonomy'] );
+ if ( ! in_array( 'post', $taxonomy_object->object_type ) && ! in_array( 'page', $taxonomy_object->object_type ) ) {
+ foreach ( $taxonomy_object->object_type as $object_type ) {
+ $_object_type = get_post_type_object( $object_type );
+
+ // Grab the first one.
+ if ( ! empty( $_object_type->has_archive ) ) {
+ $posts_page = get_post_type_archive_link( $object_type );
+ break;
+ }
+ }
+ }
+
+ // Fallback for the 'All' link is the posts page.
+ if ( ! $posts_page ) {
+ if ( 'page' == get_option( 'show_on_front' ) && get_option( 'page_for_posts' ) ) {
+ $posts_page = get_permalink( get_option( 'page_for_posts' ) );
+ } else {
+ $posts_page = home_url( '/' );
+ }
+ }
+
$posts_page = esc_url( $posts_page );
if ( 'list' == $r['style'] ) {
$output .= "<li class='cat-item-all'><a href='$posts_page'>$show_option_all</a></li>";
* @since 2.3.0
*
* @param array|string|null $args Optional. Override default arguments.
- * @return null|false Generated tag cloud, only if no failures and 'array' is set for the 'format' argument.
+ * @return void|array Generated tag cloud, only if no failures and 'array' is set for the 'format' argument.
+ * Otherwise, this function outputs the tag cloud.
*/
function wp_tag_cloud( $args = '' ) {
$defaults = array(
else
$link = get_term_link( intval($tag->term_id), $tag->taxonomy );
if ( is_wp_error( $link ) )
- return false;
+ return;
$tags[ $key ]->link = $link;
$tags[ $key ]->id = $tag->term_id;
/**
* Default topic count scaling for tag links
*
- * @param integer $count number of posts with that tag
- * @return integer scaled count
+ * @param int $count number of posts with that tag
+ * @return int scaled count
*/
function default_topic_count_scale( $count ) {
return round(log10($count + 1) * 100);
$font_spread = 1;
$font_step = $font_spread / $spread;
- $a = array();
-
+ // Assemble the data that will be used to generate the tag cloud markup.
+ $tags_data = array();
foreach ( $tags as $key => $tag ) {
+ $tag_id = isset( $tag->id ) ? $tag->id : $key;
+
$count = $counts[ $key ];
$real_count = $real_counts[ $key ];
- $tag_link = '#' != $tag->link ? esc_url( $tag->link ) : '#';
- $tag_id = isset($tags[ $key ]->id) ? $tags[ $key ]->id : $key;
- $tag_name = $tags[ $key ]->name;
if ( $translate_nooped_plural ) {
- $title_attribute = sprintf( translate_nooped_plural( $translate_nooped_plural, $real_count ), number_format_i18n( $real_count ) );
+ $title = sprintf( translate_nooped_plural( $translate_nooped_plural, $real_count ), number_format_i18n( $real_count ) );
} else {
- $title_attribute = call_user_func( $args['topic_count_text_callback'], $real_count, $tag, $args );
+ $title = call_user_func( $args['topic_count_text_callback'], $real_count, $tag, $args );
}
- $a[] = "<a href='$tag_link' class='tag-link-$tag_id' title='" . esc_attr( $title_attribute ) . "' style='font-size: " .
- str_replace( ',', '.', ( $args['smallest'] + ( ( $count - $min_count ) * $font_step ) ) )
- . $args['unit'] . ";'>$tag_name</a>";
+ $tags_data[] = array(
+ 'id' => $tag_id,
+ 'url' => '#' != $tag->link ? $tag->link : '#',
+ 'name' => $tag->name,
+ 'title' => $title,
+ 'slug' => $tag->slug,
+ 'real_count' => $real_count,
+ 'class' => 'tag-link-' . $tag_id,
+ 'font_size' => $args['smallest'] + ( $count - $min_count ) * $font_step,
+ );
+ }
+
+ /**
+ * Filter the data used to generate the tag cloud.
+ *
+ * @since 4.3.0
+ *
+ * @param array $tags_data An array of term data for term used to generate the tag cloud.
+ */
+ $tags_data = apply_filters( 'wp_generate_tag_cloud_data', $tags_data );
+
+ $a = array();
+
+ // generate the output links array
+ foreach ( $tags_data as $key => $tag_data ) {
+ $a[] = "<a href='" . esc_url( $tag_data['url'] ) . "' class='" . esc_attr( $tag_data['class'] ) . "' title='" . esc_attr( $tag_data['title'] ) . "' style='font-size: " . esc_attr( str_replace( ',', '.', $tag_data['font_size'] ) . $args['unit'] ) . ";'>" . esc_html( $tag_data['name'] ) . "</a>";
}
switch ( $args['format'] ) {
*
* @since 3.1.0
* @access private
+ * @return int
*/
function _wp_object_name_sort_cb( $a, $b ) {
return strnatcasecmp( $a->name, $b->name );
*
* @since 3.1.0
* @access private
+ * @return bool
*/
function _wp_object_count_sort_cb( $a, $b ) {
return ( $a->count > $b->count );
* @uses Walker_Category to create HTML list content.
* @since 2.1.0
* @see Walker_Category::walk() for parameters and return description.
+ * @return string
*/
function walk_category_tree() {
$args = func_get_args();
} else {
$walker = $args[2]['walker'];
}
- return call_user_func_array(array( &$walker, 'walk' ), $args );
+ return call_user_func_array( array( $walker, 'walk' ), $args );
}
/**
* @uses Walker_CategoryDropdown to create HTML dropdown content.
* @since 2.1.0
* @see Walker_CategoryDropdown::walk() for parameters and return description.
+ * @return string
*/
function walk_category_dropdown_tree() {
$args = func_get_args();
// the user's options are the third parameter
- if ( empty($args[2]['walker']) || !is_a($args[2]['walker'], 'Walker') )
+ if ( empty( $args[2]['walker'] ) || ! ( $args[2]['walker'] instanceof Walker ) ) {
$walker = new Walker_CategoryDropdown;
- else
+ } else {
$walker = $args[2]['walker'];
-
- return call_user_func_array(array( &$walker, 'walk' ), $args );
-}
-
-/**
- * Create HTML list of categories.
- *
- * @package WordPress
- * @since 2.1.0
- * @uses Walker
- */
-class Walker_Category extends Walker {
- /**
- * What the class handles.
- *
- * @see Walker::$tree_type
- * @since 2.1.0
- * @var string
- */
- public $tree_type = 'category';
-
- /**
- * Database fields to use.
- *
- * @see Walker::$db_fields
- * @since 2.1.0
- * @todo Decouple this
- * @var array
- */
- public $db_fields = array ('parent' => 'parent', 'id' => 'term_id');
-
- /**
- * Starts the list before the elements are added.
- *
- * @see Walker::start_lvl()
- *
- * @since 2.1.0
- *
- * @param string $output Passed by reference. Used to append additional content.
- * @param int $depth Depth of category. Used for tab indentation.
- * @param array $args An array of arguments. Will only append content if style argument value is 'list'.
- * @see wp_list_categories()
- */
- public function start_lvl( &$output, $depth = 0, $args = array() ) {
- if ( 'list' != $args['style'] )
- return;
-
- $indent = str_repeat("\t", $depth);
- $output .= "$indent<ul class='children'>\n";
- }
-
- /**
- * Ends the list of after the elements are added.
- *
- * @see Walker::end_lvl()
- *
- * @since 2.1.0
- *
- * @param string $output Passed by reference. Used to append additional content.
- * @param int $depth Depth of category. Used for tab indentation.
- * @param array $args An array of arguments. Will only append content if style argument value is 'list'.
- * @wsee wp_list_categories()
- */
- public function end_lvl( &$output, $depth = 0, $args = array() ) {
- if ( 'list' != $args['style'] )
- return;
-
- $indent = str_repeat("\t", $depth);
- $output .= "$indent</ul>\n";
- }
-
- /**
- * Start the element output.
- *
- * @see Walker::start_el()
- *
- * @since 2.1.0
- *
- * @param string $output Passed by reference. Used to append additional content.
- * @param object $category Category data object.
- * @param int $depth Depth of category in reference to parents. Default 0.
- * @param array $args An array of arguments. @see wp_list_categories()
- * @param int $id ID of the current category.
- */
- public function start_el( &$output, $category, $depth = 0, $args = array(), $id = 0 ) {
- /** This filter is documented in wp-includes/category-template.php */
- $cat_name = apply_filters(
- 'list_cats',
- esc_attr( $category->name ),
- $category
- );
-
- // Don't generate an element if the category name is empty.
- if ( ! $cat_name ) {
- return;
- }
-
- $link = '<a href="' . esc_url( get_term_link( $category ) ) . '" ';
- if ( $args['use_desc_for_title'] && ! empty( $category->description ) ) {
- /**
- * Filter the category description for display.
- *
- * @since 1.2.0
- *
- * @param string $description Category description.
- * @param object $category Category object.
- */
- $link .= 'title="' . esc_attr( strip_tags( apply_filters( 'category_description', $category->description, $category ) ) ) . '"';
- }
-
- $link .= '>';
- $link .= $cat_name . '</a>';
-
- if ( ! empty( $args['feed_image'] ) || ! empty( $args['feed'] ) ) {
- $link .= ' ';
-
- if ( empty( $args['feed_image'] ) ) {
- $link .= '(';
- }
-
- $link .= '<a href="' . esc_url( get_term_feed_link( $category->term_id, $category->taxonomy, $args['feed_type'] ) ) . '"';
-
- if ( empty( $args['feed'] ) ) {
- $alt = ' alt="' . sprintf(__( 'Feed for all posts filed under %s' ), $cat_name ) . '"';
- } else {
- $alt = ' alt="' . $args['feed'] . '"';
- $name = $args['feed'];
- $link .= empty( $args['title'] ) ? '' : $args['title'];
- }
-
- $link .= '>';
-
- if ( empty( $args['feed_image'] ) ) {
- $link .= $name;
- } else {
- $link .= "<img src='" . $args['feed_image'] . "'$alt" . ' />';
- }
- $link .= '</a>';
-
- if ( empty( $args['feed_image'] ) ) {
- $link .= ')';
- }
- }
-
- if ( ! empty( $args['show_count'] ) ) {
- $link .= ' (' . number_format_i18n( $category->count ) . ')';
- }
- if ( 'list' == $args['style'] ) {
- $output .= "\t<li";
- $css_classes = array(
- 'cat-item',
- 'cat-item-' . $category->term_id,
- );
-
- if ( ! empty( $args['current_category'] ) ) {
- $_current_category = get_term( $args['current_category'], $category->taxonomy );
- if ( $category->term_id == $args['current_category'] ) {
- $css_classes[] = 'current-cat';
- } elseif ( $category->term_id == $_current_category->parent ) {
- $css_classes[] = 'current-cat-parent';
- }
- }
-
- /**
- * Filter the list of CSS classes to include with each category in the list.
- *
- * @since 4.2.0
- *
- * @see wp_list_categories()
- *
- * @param array $css_classes An array of CSS classes to be applied to each list item.
- * @param object $category Category data object.
- * @param int $depth Depth of page, used for padding.
- * @param array $args An array of wp_list_categories() arguments.
- */
- $css_classes = implode( ' ', apply_filters( 'category_css_class', $css_classes, $category, $depth, $args ) );
-
- $output .= ' class="' . $css_classes . '"';
- $output .= ">$link\n";
- } else {
- $output .= "\t$link<br />\n";
- }
- }
-
- /**
- * Ends the element output, if needed.
- *
- * @see Walker::end_el()
- *
- * @since 2.1.0
- *
- * @param string $output Passed by reference. Used to append additional content.
- * @param object $page Not used.
- * @param int $depth Depth of category. Not used.
- * @param array $args An array of arguments. Only uses 'list' for whether should append to output. @see wp_list_categories()
- */
- public function end_el( &$output, $page, $depth = 0, $args = array() ) {
- if ( 'list' != $args['style'] )
- return;
-
- $output .= "</li>\n";
- }
-
-}
-
-/**
- * Create HTML dropdown list of Categories.
- *
- * @package WordPress
- * @since 2.1.0
- * @uses Walker
- */
-class Walker_CategoryDropdown extends Walker {
- /**
- * @see Walker::$tree_type
- * @since 2.1.0
- * @var string
- */
- public $tree_type = 'category';
-
- /**
- * @see Walker::$db_fields
- * @since 2.1.0
- * @todo Decouple this
- * @var array
- */
- public $db_fields = array ('parent' => 'parent', 'id' => 'term_id');
-
- /**
- * Start the element output.
- *
- * @see Walker::start_el()
- * @since 2.1.0
- *
- * @param string $output Passed by reference. Used to append additional content.
- * @param object $category Category data object.
- * @param int $depth Depth of category. Used for padding.
- * @param array $args Uses 'selected', 'show_count', and 'value_field' keys, if they exist.
- * See {@see wp_dropdown_categories()}.
- */
- public function start_el( &$output, $category, $depth = 0, $args = array(), $id = 0 ) {
- $pad = str_repeat(' ', $depth * 3);
-
- /** This filter is documented in wp-includes/category-template.php */
- $cat_name = apply_filters( 'list_cats', $category->name, $category );
-
- if ( ! isset( $args['value_field'] ) || ! isset( $category->{$args['value_field']} ) ) {
- $args['value_field'] = 'term_id';
- }
-
- $output .= "\t<option class=\"level-$depth\" value=\"" . esc_attr( $category->{$args['value_field']} ) . "\"";
-
- if ( $category->term_id == $args['selected'] )
- $output .= ' selected="selected"';
- $output .= '>';
- $output .= $pad.$cat_name;
- if ( $args['show_count'] )
- $output .= ' ('. number_format_i18n( $category->count ) .')';
- $output .= "</option>\n";
}
+ return call_user_func_array( array( $walker, 'walk' ), $args );
}
//
* @since 2.3.0
*
* @param int $id Post ID.
- * @return array|bool Array of tag objects on success, false on failure.
+ * @return array|false|WP_Error Array of tag objects on success, false on failure.
*/
function get_the_tags( $id = 0 ) {
* @param string $sep Optional. Between tags.
* @param string $after Optional. After tags.
* @param int $id Optional. Post ID. Defaults to the current post.
- * @return string|bool|WP_Error A list of tags on success, false if there are no terms, WP_Error on failure.
+ * @return string|false|WP_Error A list of tags on success, false if there are no terms, WP_Error on failure.
*/
function get_the_tag_list( $before = '', $sep = '', $after = '', $id = 0 ) {
*
* @param int|object $post Post ID or object.
* @param string $taxonomy Taxonomy name.
- * @return array|bool|WP_Error Array of term objects on success, false if there are no terms
- * or the post does not exist, WP_Error on failure.
+ * @return array|false|WP_Error Array of term objects on success, false if there are no terms
+ * or the post does not exist, WP_Error on failure.
*/
function get_the_terms( $post, $taxonomy ) {
if ( ! $post = get_post( $post ) )
$terms = get_object_term_cache( $post->ID, $taxonomy );
if ( false === $terms ) {
$terms = wp_get_object_terms( $post->ID, $taxonomy );
- wp_cache_add($post->ID, $terms, $taxonomy . '_relationships');
+ if ( ! is_wp_error( $terms ) ) {
+ $to_cache = array();
+ foreach ( $terms as $key => $term ) {
+ $to_cache[ $key ] = $term->data;
+ }
+ wp_cache_add( $post->ID, $to_cache, $taxonomy . '_relationships' );
+ }
+ }
+
+ if ( ! is_wp_error( $terms ) ) {
+ $terms = array_map( 'get_term', $terms );
}
/**
* @param string $before Optional. Before list.
* @param string $sep Optional. Separate items using this.
* @param string $after Optional. After list.
- * @return string|bool|WP_Error A list of terms on success, false if there are no terms, WP_Error on failure.
+ * @return string|false|WP_Error A list of terms on success, false if there are no terms, WP_Error on failure.
*/
function get_the_term_list( $id, $taxonomy, $before = '', $sep = '', $after = '' ) {
$terms = get_the_terms( $id, $taxonomy );
* @param string $before Optional. Before list.
* @param string $sep Optional. Separate items using this.
* @param string $after Optional. After list.
- * @return false|null False on WordPress error. Returns null when displaying.
+ * @return false|void False on WordPress error.
*/
function the_terms( $id, $taxonomy, $before = '', $sep = ', ', $after = '' ) {
$term_list = get_the_term_list( $id, $taxonomy, $before, $sep, $after );
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