/ function get_the_category_list( $separator = '', $parents = '', $post_id = false ) { global $wp_rewrite; if ( ! is_object_in_taxonomy( get_post_type( $post_id ), 'category' ) ) { /** This filter is documented in wp-includes/category-template.php */ return apply_filters( 'the_category', '', $separator, $parents ); } /** * Filters the categories before building the category list. * * @since 4.4.0 * * @param WP_Term[] $categories An array of the post's categories. * @param int|false $post_id ID of the post to retrieve categories for. * When `false`, defaults to 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 ); } $rel = ( is_object( $wp_rewrite ) && $wp_rewrite->using_permalinks() ) ? 'rel="category tag"' : 'rel="category"'; $thelist = ''; if ( '' === $separator ) { $thelist .= ''; } else { $i = 0; foreach ( $categories as $category ) { if ( 0 < $i ) { $thelist .= $separator; } switch ( strtolower( $parents ) ) { case 'multiple': if ( $category->parent ) { $thelist .= get_category_parents( $category->parent, true, $separator ); } $thelist .= '' . $category->name . ''; break; case 'single': $thelist .= ''; if ( $category->parent ) { $thelist .= get_category_parents( $category->parent, false, $separator ); } $thelist .= "$category->name"; break; case '': default: $thelist .= '' . $category->name . ''; } ++$i; } } /** * Filters the category or list of categories. * * @since 1.2.0 * * @param string $thelist List of categories for the current post. * @param string $separator Separator used between the categories. * @param string $parents How to display the category parents. Accepts 'multiple', * 'single', or empty. */ return apply_filters( 'the_category', $thelist, $separator, $parents ); } /** * Checks if the current post is within any of the given categories. * * The given categories are checked against the post's categories' term_ids, names and slugs. * Categories given as integers will only be checked against the post's categories' term_ids. * * Prior to v2.5 of WordPress, category names were not supported. * Prior to v2.7, category slugs were not supported. * Prior to v2.7, only one category could be compared: in_category( $single_category ). * Prior to v2.7, this function could only be used in the WordPress Loop. * As of 2.7, the function can be used anywhere if it is provided a post ID or post object. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 1.2.0 * @since 2.7.0 The `$post` parameter was added. * * @param int|string|int[]|string[] $category Category ID, name, slug, or array of such * to check against. * @param int|WP_Post $post Optional. Post to check. Defaults to the current post. * @return bool True if the current post is in any of the given categories. */ function in_category( $category, $post = null ) { if ( empty( $category ) ) { return false; } return has_category( $category, $post ); } /** * Displays category list for a post in either HTML list or custom format. * * @since 0.71 * * @param string $separator Optional. Separator between the categories. By default, the links are placed * in an unordered list. An empty string will result in the default behavior. * @param string $parents Optional. How to display the parents. Accepts 'multiple', 'single', or empty. * Default empty string. * @param int $post_id Optional. ID of the post to retrieve categories for. Defaults to the current post. */ function the_category( $separator = '', $parents = '', $post_id = false ) { echo get_the_category_list( $separator, $parents, $post_id ); } /** * Retrieves category description. * * @since 1.0.0 * * @param int $category Optional. Category ID. Defaults to the current category ID. * @return string Category description, if available. */ function category_description( $category = 0 ) { return term_description( $category ); } /** * Displays or retrieves the HTML dropdown list of categories. * * The 'hierarchical' argument, which is disabled by default, will override the * depth argument, unless it is true. When the argument is false, it will * display all of the categories. When it is enabled it will use the value in * the 'depth' argument. * * @since 2.1.0 * @since 4.2.0 Introduced the `value_field` argument. * @since 4.6.0 Introduced the `required` argument. * @since 6.1.0 Introduced the `aria_describedby` argument. * * @param array|string $args { * Optional. Array or string of arguments to generate a categories drop-down element. See WP_Term_Query::__construct() * for information on additional accepted arguments. * * @type string $show_option_all Text to display for showing all categories. Default empty. * @type string $show_option_none Text to display for showing no categories. Default empty. * @type string $option_none_value Value to use when no category is selected. Default empty. * @type string $orderby Which column to use for ordering categories. See get_terms() for a list * of accepted values. Default 'id' (term_id). * @type bool $pad_counts See get_terms() for an argument description. Default false. * @type bool|int $show_count Whether to include post counts. Accepts 0, 1, or their bool equivalents. * Default 0. * @type bool|int $echo Whether to echo or return the generated markup. Accepts 0, 1, or their * bool equivalents. Default 1. * @type bool|int $hierarchical Whether to traverse the taxonomy hierarchy. Accepts 0, 1, or their bool * equivalents. Default 0. * @type int $depth Maximum depth. Default 0. * @type int $tab_index Tab index for the select element. Default 0 (no tabindex). * @type string $name Value for the 'name' attribute of the select element. Default 'cat'. * @type string $id Value for the 'id' attribute of the select element. Defaults to the value * of `$name`. * @type string $class Value for the 'class' attribute of the select element. Default 'postform'. * @type int|string $selected Value of the option that should be selected. Default 0. * @type string $value_field Term field that should be used to populate the 'value' attribute * of the option elements. Accepts any valid term field: 'term_id', 'name', * 'slug', 'term_group', 'term_taxonomy_id', 'taxonomy', 'description', * 'parent', 'count'. Default 'term_id'. * @type string|array $taxonomy Name of the taxonomy or taxonomies to retrieve. Default 'category'. * @type bool $hide_if_empty True to skip generating markup if no categories are found. * Default false (create select element even if no categories are found). * @type bool $required Whether the `\n"; } else { $output = ''; } if ( empty( $categories ) && ! $parsed_args['hide_if_empty'] && ! empty( $parsed_args['show_option_none'] ) ) { /** * Filters a taxonomy drop-down display element. * * A variety of taxonomy drop-down display elements can be modified * just prior to display via this filter. Filterable arguments include * 'show_option_none', 'show_option_all', and various forms of the * term name. * * @since 1.2.0 * * @see wp_dropdown_categories() * * @param string $element Category name. * @param WP_Term|null $category The category object, or null if there's no corresponding category. */ $show_option_none = apply_filters( 'list_cats', $parsed_args['show_option_none'], null ); $output .= "\t\n"; } if ( ! empty( $categories ) ) { if ( $parsed_args['show_option_all'] ) { /** This filter is documented in wp-includes/category-template.php */ $show_option_all = apply_filters( 'list_cats', $parsed_args['show_option_all'], null ); $selected = ( '0' === (string) $parsed_args['selected'] ) ? " selected='selected'" : ''; $output .= "\t\n"; } if ( $parsed_args['show_option_none'] ) { /** This filter is documented in wp-includes/category-template.php */ $show_option_none = apply_filters( 'list_cats', $parsed_args['show_option_none'], null ); $selected = selected( $option_none_value, $parsed_args['selected'], false ); $output .= "\t\n"; } if ( $parsed_args['hierarchical'] ) { $depth = $parsed_args['depth']; // Walk the full depth. } else { $depth = -1; // Flat. } $output .= walk_category_dropdown_tree( $categories, $depth, $parsed_args ); } if ( ! $parsed_args['hide_if_empty'] || ! empty( $categories ) ) { $output .= "\n"; } /** * Filters the taxonomy drop-down output. * * @since 2.1.0 * * @param string $output HTML output. * @param array $parsed_args Arguments used to build the drop-down. */ $output = apply_filters( 'wp_dropdown_cats', $output, $parsed_args ); if ( $parsed_args['echo'] ) { echo $output; } return $output; } /** * Displays or retrieves the HTML list of categories. * * @since 2.1.0 * @since 4.4.0 Introduced the `hide_title_if_empty` and `separator` arguments. * @since 4.4.0 The `current_category` argument was modified to optionally accept an array of values. * @since 6.1.0 Default value of the 'use_desc_for_title' argument was changed from 1 to 0. * * @param array|string $args { * Array of optional arguments. See get_categories(), get_terms(), and WP_Term_Query::__construct() * for information on additional accepted arguments. * * @type int|int[] $current_category ID of category, or array of IDs of categories, that should get the * 'current-cat' class. Default 0. * @type int $depth Category depth. Used for tab indentation. Default 0. * @type bool|int $echo Whether to echo or return the generated markup. Accepts 0, 1, or their * bool equivalents. Default 1. * @type int[]|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 get_terms(). * Default empty string. * @type int[]|string $exclude_tree Array or comma/space-separated string of term IDs to exclude, along * with their descendants. See get_terms(). Default empty string. * @type string $feed Text to use for the feed link. Default 'Feed for all posts filed * under [cat name]'. * @type string $feed_image URL of an image to use for the feed link. Default empty string. * @type string $feed_type Feed type. Used to build feed link. See get_term_feed_link(). * Default empty string (default feed). * @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 string $separator Separator between links. Default '
'. * @type bool|int $show_count Whether to include post counts. Accepts 0, 1, or their bool equivalents. * Default 0. * @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 $style The style used to display the categories list. If 'list', categories * will be output as an unordered list. If left empty or another value, * categories will be output separated by `
` tags. Default 'list'. * @type string $taxonomy Name of the taxonomy to retrieve. Default 'category'. * @type string $title_li Text to use for the list title `
  • ` element. Pass an empty string * to disable. Default 'Categories'. * @type bool|int $use_desc_for_title Whether to use the category description as the title attribute. * Accepts 0, 1, or their bool equivalents. Default 0. * @type Walker $walker Walker object to use to build the output. Default empty which results * in a Walker_Category instance being used. * } * @return void|string|false Void if 'echo' argument is true, HTML list of categories if 'echo' is false. * False if the taxonomy does not exist. */ function wp_list_categories( $args = '' ) { $defaults = array( 'child_of' => 0, 'current_category' => 0, 'depth' => 0, 'echo' => 1, 'exclude' => '', 'exclude_tree' => '', 'feed' => '', 'feed_image' => '', 'feed_type' => '', 'hide_empty' => 1, 'hide_title_if_empty' => false, 'hierarchical' => true, 'order' => 'ASC', 'orderby' => 'name', 'separator' => '
    ', 'show_count' => 0, 'show_option_all' => '', 'show_option_none' => __( 'No categories' ), 'style' => 'list', 'taxonomy' => 'category', 'title_li' => __( 'Categories' ), 'use_desc_for_title' => 0, ); $parsed_args = wp_parse_args( $args, $defaults ); if ( ! isset( $parsed_args['pad_counts'] ) && $parsed_args['show_count'] && $parsed_args['hierarchical'] ) { $parsed_args['pad_counts'] = true; } // Descendants of exclusions should be excluded too. if ( $parsed_args['hierarchical'] ) { $exclude_tree = array(); if ( $parsed_args['exclude_tree'] ) { $exclude_tree = array_merge( $exclude_tree, wp_parse_id_list( $parsed_args['exclude_tree'] ) ); } if ( $parsed_args['exclude'] ) { $exclude_tree = array_merge( $exclude_tree, wp_parse_id_list( $parsed_args['exclude'] ) ); } $parsed_args['exclude_tree'] = $exclude_tree; $parsed_args['exclude'] = ''; } if ( ! isset( $parsed_args['class'] ) ) { $parsed_args['class'] = ( 'category' === $parsed_args['taxonomy'] ) ? 'categories' : $parsed_args['taxonomy']; } if ( ! taxonomy_exists( $parsed_args['taxonomy'] ) ) { return false; } $show_option_all = $parsed_args['show_option_all']; $show_option_none = $parsed_args['show_option_none']; $categories = get_categories( $parsed_args ); $output = ''; if ( $parsed_args['title_li'] && 'list' === $parsed_args['style'] && ( ! empty( $categories ) || ! $parsed_args['hide_title_if_empty'] ) ) { $output = '
  • ' . $parsed_args['title_li'] . '
    • '; } /** * Filters the HTML output of a taxonomy list. * * @since 2.1.0 * * @param string $output HTML output. * @param array|string $args An array or query string of taxonomy-listing arguments. See * wp_list_categories() for information on accepted arguments. */ $html = apply_filters( 'wp_list_categories', $output, $args ); if ( $parsed_args['echo'] ) { echo $html; } else { return $html; } } /** * Displays a tag cloud. * * Outputs a list of tags in what is called a 'tag cloud', where the size of each tag * is determined by how many times that particular tag has been assigned to posts. * * @since 2.3.0 * @since 2.8.0 Added the `taxonomy` argument. * @since 4.8.0 Added the `show_count` argument. * * @param array|string $args { * Optional. Array or string of arguments for displaying a tag cloud. See wp_generate_tag_cloud() * and get_terms() for the full lists of arguments that can be passed in `$args`. * * @type int $number The number of tags to display. Accepts any positive integer * or zero to return all. Default 45. * @type string $link Whether to display term editing links or term permalinks. * Accepts 'edit' and 'view'. Default 'view'. * @type string $post_type The post type. Used to highlight the proper post type menu * on the linked edit page. Defaults to the first post type * associated with the taxonomy. * @type bool $echo Whether or not to echo the return value. Default true. * } * @return void|string|string[] Void if 'echo' argument is true, or on failure. Otherwise, tag cloud * as a string or an array, depending on 'format' argument. */ function wp_tag_cloud( $args = '' ) { $defaults = array( 'smallest' => 8, 'largest' => 22, 'unit' => 'pt', 'number' => 45, 'format' => 'flat', 'separator' => "\n", 'orderby' => 'name', 'order' => 'ASC', 'exclude' => '', 'include' => '', 'link' => 'view', 'taxonomy' => 'post_tag', 'post_type' => '', 'echo' => true, 'show_count' => 0, ); $args = wp_parse_args( $args, $defaults ); $tags = get_terms( array_merge( $args, array( 'orderby' => 'count', 'order' => 'DESC', ) ) ); // Always query top tags. if ( empty( $tags ) || is_wp_error( $tags ) ) { return; } foreach ( $tags as $key => $tag ) { if ( 'edit' === $args['link'] ) { $link = get_edit_term_link( $tag, $tag->taxonomy, $args['post_type'] ); } else { $link = get_term_link( $tag, $tag->taxonomy ); } if ( is_wp_error( $link ) ) { return; } $tags[ $key ]->link = $link; $tags[ $key ]->id = $tag->term_id; } // Here's where those top tags get sorted according to $args. $return = wp_generate_tag_cloud( $tags, $args ); /** * Filters the tag cloud output. * * @since 2.3.0 * * @param string|string[] $return Tag cloud as a string or an array, depending on 'format' argument. * @param array $args An array of tag cloud arguments. See wp_tag_cloud() * for information on accepted arguments. */ $return = apply_filters( 'wp_tag_cloud', $return, $args ); if ( 'array' === $args['format'] || empty( $args['echo'] ) ) { return $return; } echo $return; } /** * Default topic count scaling for tag links. * * @since 2.9.0 * * @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 ); } /** * Generates a tag cloud (heatmap) from provided data. * * @todo Complete functionality. * @since 2.3.0 * @since 4.8.0 Added the `show_count` argument. * * @param WP_Term[] $tags Array of WP_Term objects to generate the tag cloud for. * @param string|array $args { * Optional. Array or string of arguments for generating a tag cloud. * * @type int $smallest Smallest font size used to display tags. Paired * with the value of `$unit`, to determine CSS text * size unit. Default 8 (pt). * @type int $largest Largest font size used to display tags. Paired * with the value of `$unit`, to determine CSS text * size unit. Default 22 (pt). * @type string $unit CSS text size unit to use with the `$smallest` * and `$largest` values. Accepts any valid CSS text * size unit. Default 'pt'. * @type int $number The number of tags to return. Accepts any * positive integer or zero to return all. * Default 0. * @type string $format Format to display the tag cloud in. Accepts 'flat' * (tags separated with spaces), 'list' (tags displayed * in an unordered list), or 'array' (returns an array). * Default 'flat'. * @type string $separator HTML or text to separate the tags. Default "\n" (newline). * @type string $orderby Value to order tags by. Accepts 'name' or 'count'. * Default 'name'. The {@see 'tag_cloud_sort'} filter * can also affect how tags are sorted. * @type string $order How to order the tags. Accepts 'ASC' (ascending), * 'DESC' (descending), or 'RAND' (random). Default 'ASC'. * @type int|bool $filter Whether to enable filtering of the final output * via {@see 'wp_generate_tag_cloud'}. Default 1. * @type array $topic_count_text Nooped plural text from _n_noop() to supply to * tag counts. Default null. * @type callable $topic_count_text_callback Callback used to generate nooped plural text for * tag counts based on the count. Default null. * @type callable $topic_count_scale_callback Callback used to determine the tag count scaling * value. Default default_topic_count_scale(). * @type bool|int $show_count Whether to display the tag counts. Default 0. Accepts * 0, 1, or their bool equivalents. * } * @return string|string[] Tag cloud as a string or an array, depending on 'format' argument. */ function wp_generate_tag_cloud( $tags, $args = '' ) { $defaults = array( 'smallest' => 8, 'largest' => 22, 'unit' => 'pt', 'number' => 0, 'format' => 'flat', 'separator' => "\n", 'orderby' => 'name', 'order' => 'ASC', 'topic_count_text' => null, 'topic_count_text_callback' => null, 'topic_count_scale_callback' => 'default_topic_count_scale', 'filter' => 1, 'show_count' => 0, ); $args = wp_parse_args( $args, $defaults ); $return = ( 'array' === $args['format'] ) ? array() : ''; if ( empty( $tags ) ) { return $return; } // Juggle topic counts. if ( isset( $args['topic_count_text'] ) ) { // First look for nooped plural support via topic_count_text. $translate_nooped_plural = $args['topic_count_text']; } elseif ( ! empty( $args['topic_count_text_callback'] ) ) { // Look for the alternative callback style. Ignore the previous default. if ( 'default_topic_count_text' === $args['topic_count_text_callback'] ) { /* translators: %s: Number of items (tags). */ $translate_nooped_plural = _n_noop( '%s item', '%s items' ); } else { $translate_nooped_plural = false; } } elseif ( isset( $args['single_text'] ) && isset( $args['multiple_text'] ) ) { // If no callback exists, look for the old-style single_text and multiple_text arguments. // phpcs:ignore WordPress.WP.I18n.NonSingularStringLiteralSingular,WordPress.WP.I18n.NonSingularStringLiteralPlural $translate_nooped_plural = _n_noop( $args['single_text'], $args['multiple_text'] ); } else { // This is the default for when no callback, plural, or argument is passed in. /* translators: %s: Number of items (tags). */ $translate_nooped_plural = _n_noop( '%s item', '%s items' ); } /** * Filters how the items in a tag cloud are sorted. * * @since 2.8.0 * * @param WP_Term[] $tags Ordered array of terms. * @param array $args An array of tag cloud arguments. */ $tags_sorted = apply_filters( 'tag_cloud_sort', $tags, $args ); if ( empty( $tags_sorted ) ) { return $return; } if ( $tags_sorted !== $tags ) { $tags = $tags_sorted; unset( $tags_sorted ); } else { if ( 'RAND' === $args['order'] ) { shuffle( $tags ); } else { // SQL cannot save you; this is a second (potentially different) sort on a subset of data. if ( 'name' === $args['orderby'] ) { uasort( $tags, '_wp_object_name_sort_cb' ); } else { uasort( $tags, '_wp_object_count_sort_cb' ); } if ( 'DESC' === $args['order'] ) { $tags = array_reverse( $tags, true ); } } } if ( $args['number'] > 0 ) { $tags = array_slice( $tags, 0, $args['number'] ); } $counts = array(); $real_counts = array(); // For the alt tag. foreach ( (array) $tags as $key => $tag ) { $real_counts[ $key ] = $tag->count; $counts[ $key ] = call_user_func( $args['topic_count_scale_callback'], $tag->count ); } $min_count = min( $counts ); $spread = max( $counts ) - $min_count; if ( $spread <= 0 ) { $spread = 1; } $font_spread = $args['largest'] - $args['smallest']; if ( $font_spread < 0 ) { $font_spread = 1; } $font_step = $font_spread / $spread; $aria_label = false; /* * Determine whether to output an 'aria-label' attribute with the tag name and count. * When tags have a different font size, they visually convey an important information * that should be available to assistive technologies too. On the other hand, sometimes * themes set up the Tag Cloud to display all tags with the same font size (setting * the 'smallest' and 'largest' arguments to the same value). * In order to always serve the same content to all users, the 'aria-label' gets printed out: * - when tags have a different size * - when the tag count is displayed (for example when users check the checkbox in the * Tag Cloud widget), regardless of the tags font size */ if ( $args['show_count'] || 0 !== $font_spread ) { $aria_label = true; } // 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 ]; if ( $translate_nooped_plural ) { $formatted_count = sprintf( translate_nooped_plural( $translate_nooped_plural, $real_count ), number_format_i18n( $real_count ) ); } else { $formatted_count = call_user_func( $args['topic_count_text_callback'], $real_count, $tag, $args ); } $tags_data[] = array( 'id' => $tag_id, 'url' => ( '#' !== $tag->link ) ? $tag->link : '#', 'role' => ( '#' !== $tag->link ) ? '' : ' role="button"', 'name' => $tag->name, 'formatted_count' => $formatted_count, 'slug' => $tag->slug, 'real_count' => $real_count, 'class' => 'tag-cloud-link tag-link-' . $tag_id, 'font_size' => $args['smallest'] + ( $count - $min_count ) * $font_step, 'aria_label' => $aria_label ? sprintf( ' aria-label="%1$s (%2$s)"', esc_attr( $tag->name ), esc_attr( $formatted_count ) ) : '', 'show_count' => $args['show_count'] ? ' (' . $real_count . ')' : '', ); } /** * Filters the data used to generate the tag cloud. * * @since 4.3.0 * * @param array[] $tags_data An array of term data arrays for terms 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 ) { $class = $tag_data['class'] . ' tag-link-position-' . ( $key + 1 ); $a[] = sprintf( '%6$s%7$s', esc_url( $tag_data['url'] ), $tag_data['role'], esc_attr( $class ), esc_attr( str_replace( ',', '.', $tag_data['font_size'] ) . $args['unit'] ), $tag_data['aria_label'], esc_html( $tag_data['name'] ), $tag_data['show_count'] ); } switch ( $args['format'] ) { case 'array': $return =& $a; break; case 'list': /* * Force role="list", as some browsers (sic: Safari 10) don't expose to assistive * technologies the default role when the list is styled with `list-style: none`. * Note: this is redundant but doesn't harm. */ $return = "\n"; break; default: $return = implode( $args['separator'], $a ); break; } if ( $args['filter'] ) { /** * Filters the generated output of a tag cloud. * * The filter is only evaluated if a true value is passed * to the $filter argument in wp_generate_tag_cloud(). * * @since 2.3.0 * * @see wp_generate_tag_cloud() * * @param string[]|string $return String containing the generated HTML tag cloud output * or an array of tag links if the 'format' argument * equals 'array'. * @param WP_Term[] $tags An array of terms used in the tag cloud. * @param array $args An array of wp_generate_tag_cloud() arguments. */ return apply_filters( 'wp_generate_tag_cloud', $return, $tags, $args ); } else { return $return; } } /** * Serves as a callback for comparing objects based on name. * * Used with `uasort()`. * * @since 3.1.0 * @access private * * @param object $a The first object to compare. * @param object $b The second object to compare. * @return int Negative number if `$a->name` is less than `$b->name`, zero if they are equal, * or greater than zero if `$a->name` is greater than `$b->name`. */ function _wp_object_name_sort_cb( $a, $b ) { return strnatcasecmp( $a->name, $b->name ); } /** * Serves as a callback for comparing objects based on count. * * Used with `uasort()`. * * @since 3.1.0 * @access private * * @param object $a The first object to compare. * @param object $b The second object to compare. * @return int Negative number if `$a->count` is less than `$b->count`, zero if they are equal, * or greater than zero if `$a->count` is greater than `$b->count`. */ function _wp_object_count_sort_cb( $a, $b ) { return ( $a->count - $b->count ); } // // Helper functions. // /** * Retrieves HTML list content for category list. * * @since 2.1.0 * @since 5.3.0 Formalized the existing `...$args` parameter by adding it * to the function signature. * * @uses Walker_Category to create HTML list content. * @see Walker::walk() for parameters and return description. * * @param mixed ...$args Elements array, maximum hierarchical depth and optional additional arguments. * @return string */ function walk_category_tree( ...$args ) { // The user's options are the third parameter. if ( empty( $args[2]['walker'] ) || ! ( $args[2]['walker'] instanceof Walker ) ) { $walker = new Walker_Category(); } else { /** * @var Walker $walker */ $walker = $args[2]['walker']; } return $walker->walk( ...$args ); } /** * Retrieves HTML dropdown (select) content for category list. * * @since 2.1.0 * @since 5.3.0 Formalized the existing `...$args` parameter by adding it * to the function signature. * * @uses Walker_CategoryDropdown to create HTML dropdown content. * @see Walker::walk() for parameters and return description. * * @param mixed ...$args Elements array, maximum hierarchical depth and optional additional arguments. * @return string */ function walk_category_dropdown_tree( ...$args ) { // The user's options are the third parameter. if ( empty( $args[2]['walker'] ) || ! ( $args[2]['walker'] instanceof Walker ) ) { $walker = new Walker_CategoryDropdown(); } else { /** * @var Walker $walker */ $walker = $args[2]['walker']; } return $walker->walk( ...$args ); } // // Tags. // /** * Retrieves the link to the tag. * * @since 2.3.0 * * @see get_term_link() * * @param int|object $tag Tag ID or object. * @return string Link on success, empty string if tag does not exist. */ function get_tag_link( $tag ) { return get_category_link( $tag ); } /** * Retrieves the tags for a post. * * @since 2.3.0 * * @param int|WP_Post $post Post ID or object. * @return WP_Term[]|false|WP_Error Array of WP_Term objects on success, false if there are no terms * or the post does not exist, WP_Error on failure. */ function get_the_tags( $post = 0 ) { $terms = get_the_terms( $post, 'post_tag' ); /** * Filters the array of tags for the given post. * * @since 2.3.0 * * @see get_the_terms() * * @param WP_Term[]|false|WP_Error $terms Array of WP_Term objects on success, false if there are no terms * or the post does not exist, WP_Error on failure. */ return apply_filters( 'get_the_tags', $terms ); } /** * Retrieves the tags for a post formatted as a string. * * @since 2.3.0 * * @param string $before Optional. String to use before the tags. Default empty. * @param string $sep Optional. String to use between the tags. Default empty. * @param string $after Optional. String to use after the tags. Default empty. * @param int $post_id Optional. Post ID. Defaults to the current post ID. * @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 = '', $post_id = 0 ) { $tag_list = get_the_term_list( $post_id, 'post_tag', $before, $sep, $after ); /** * Filters the tags list for a given post. * * @since 2.3.0 * * @param string $tag_list List of tags. * @param string $before String to use before the tags. * @param string $sep String to use between the tags. * @param string $after String to use after the tags. * @param int $post_id Post ID. */ return apply_filters( 'the_tags', $tag_list, $before, $sep, $after, $post_id ); } /** * Displays the tags for a post. * * @since 2.3.0 * * @param string $before Optional. String to use before the tags. Defaults to 'Tags:'. * @param string $sep Optional. String to use between the tags. Default ', '. * @param string $after Optional. String to use after the tags. Default empty. */ function the_tags( $before = null, $sep = ', ', $after = '' ) { if ( null === $before ) { $before = __( 'Tags: ' ); } $the_tags = get_the_tag_list( $before, $sep, $after ); if ( ! is_wp_error( $the_tags ) ) { echo $the_tags; } } /** * Retrieves tag description. * * @since 2.8.0 * * @param int $tag Optional. Tag ID. Defaults to the current tag ID. * @return string Tag description, if available. */ function tag_description( $tag = 0 ) { return term_description( $tag ); } /** * Retrieves term description. * * @since 2.8.0 * @since 4.9.2 The `$taxonomy` parameter was deprecated. * * @param int $term Optional. Term ID. Defaults to the current term ID. * @param null $deprecated Deprecated. Not used. * @return string Term description, if available. */ function term_description( $term = 0, $deprecated = null ) { if ( ! $term && ( is_tax() || is_tag() || is_category() ) ) { $term = get_queried_object(); if ( $term ) { $term = $term->term_id; } } $description = get_term_field( 'description', $term ); return is_wp_error( $description ) ? '' : $description; } /** * Retrieves the terms of the taxonomy that are attached to the post. * * @since 2.5.0 * * @param int|WP_Post $post Post ID or object. * @param string $taxonomy Taxonomy name. * @return WP_Term[]|false|WP_Error Array of WP_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 ) { $post = get_post( $post ); if ( ! $post ) { return false; } $terms = get_object_term_cache( $post->ID, $taxonomy ); if ( false === $terms ) { $terms = wp_get_object_terms( $post->ID, $taxonomy ); if ( ! is_wp_error( $terms ) ) { $term_ids = wp_list_pluck( $terms, 'term_id' ); wp_cache_add( $post->ID, $term_ids, $taxonomy . '_relationships' ); } } /** * Filters the list of terms attached to the given post. * * @since 3.1.0 * * @param WP_Term[]|WP_Error $terms Array of attached terms, or WP_Error on failure. * @param int $post_id Post ID. * @param string $taxonomy Name of the taxonomy. */ $terms = apply_filters( 'get_the_terms', $terms, $post->ID, $taxonomy ); if ( empty( $terms ) ) { return false; } return $terms; } /** * Retrieves a post's terms as a list with specified format. * * Terms are linked to their respective term listing pages. * * @since 2.5.0 * * @param int $post_id Post ID. * @param string $taxonomy Taxonomy name. * @param string $before Optional. String to use before the terms. Default empty. * @param string $sep Optional. String to use between the terms. Default empty. * @param string $after Optional. String to use after the terms. Default empty. * @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( $post_id, $taxonomy, $before = '', $sep = '', $after = '' ) { $terms = get_the_terms( $post_id, $taxonomy ); if ( is_wp_error( $terms ) ) { return $terms; } if ( empty( $terms ) ) { return false; } $links = array(); foreach ( $terms as $term ) { $link = get_term_link( $term, $taxonomy ); if ( is_wp_error( $link ) ) { return $link; } $links[] = ''; } /** * Filters the term links for a given taxonomy. * * The dynamic portion of the hook name, `$taxonomy`, refers * to the taxonomy slug. * * Possible hook names include: * * - `term_links-category` * - `term_links-post_tag` * - `term_links-post_format` * * @since 2.5.0 * * @param string[] $links An array of term links. */ $term_links = apply_filters( "term_links-{$taxonomy}", $links ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores return $before . implode( $sep, $term_links ) . $after; } /** * Retrieves term parents with separator. * * @since 4.8.0 * * @param int $term_id Term ID. * @param string $taxonomy Taxonomy name. * @param string|array $args { * Array of optional arguments. * * @type string $format Use term names or slugs for display. Accepts 'name' or 'slug'. * Default 'name'. * @type string $separator Separator for between the terms. Default '/'. * @type bool $link Whether to format as a link. Default true. * @type bool $inclusive Include the term to get the parents for. Default true. * } * @return string|WP_Error A list of term parents on success, WP_Error or empty string on failure. */ function get_term_parents_list( $term_id, $taxonomy, $args = array() ) { $list = ''; $term = get_term( $term_id, $taxonomy ); if ( is_wp_error( $term ) ) { return $term; } if ( ! $term ) { return $list; } $term_id = $term->term_id; $defaults = array( 'format' => 'name', 'separator' => '/', 'link' => true, 'inclusive' => true, ); $args = wp_parse_args( $args, $defaults ); foreach ( array( 'link', 'inclusive' ) as $bool ) { $args[ $bool ] = wp_validate_boolean( $args[ $bool ] ); } $parents = get_ancestors( $term_id, $taxonomy, 'taxonomy' ); if ( $args['inclusive'] ) { array_unshift( $parents, $term_id ); } foreach ( array_reverse( $parents ) as $term_id ) { $parent = get_term( $term_id, $taxonomy ); $name = ( 'slug' === $args['format'] ) ? $parent->slug : $parent->name; if ( $args['link'] ) { $list .= '' . $name . '' . $args['separator']; } else { $list .= $name . $args['separator']; } } return $list; } /** * Displays the terms for a post in a list. * * @since 2.5.0 * * @param int $post_id Post ID. * @param string $taxonomy Taxonomy name. * @param string $before Optional. String to use before the terms. Default empty. * @param string $sep Optional. String to use between the terms. Default ', '. * @param string $after Optional. String to use after the terms. Default empty. * @return void|false Void on success, false on failure. */ function the_terms( $post_id, $taxonomy, $before = '', $sep = ', ', $after = '' ) { $term_list = get_the_term_list( $post_id, $taxonomy, $before, $sep, $after ); if ( is_wp_error( $term_list ) ) { return false; } /** * Filters the list of terms to display. * * @since 2.9.0 * * @param string $term_list List of terms to display. * @param string $taxonomy The taxonomy name. * @param string $before String to use before the terms. * @param string $sep String to use between the terms. * @param string $after String to use after the terms. */ echo apply_filters( 'the_terms', $term_list, $taxonomy, $before, $sep, $after ); } /** * Checks if the current post has any of given category. * * The given categories are checked against the post's categories' term_ids, names and slugs. * Categories given as integers will only be checked against the post's categories' term_ids. * * If no categories are given, determines if post has any categories. * * @since 3.1.0 * * @param string|int|array $category Optional. The category name/term_id/slug, * or an array of them to check for. Default empty. * @param int|WP_Post $post Optional. Post to check. Defaults to the current post. * @return bool True if the current post has any of the given categories * (or any category, if no category specified). False otherwise. */ function has_category( $category = '', $post = null ) { return has_term( $category, 'category', $post ); } /** * Checks if the current post has any of given tags. * * The given tags are checked against the post's tags' term_ids, names and slugs. * Tags given as integers will only be checked against the post's tags' term_ids. * * If no tags are given, determines if post has any tags. * * For more information on this and similar theme functions, check out * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ * Conditional Tags} article in the Theme Developer Handbook. * * @since 2.6.0 * @since 2.7.0 Tags given as integers are only checked against * the post's tags' term_ids, not names or slugs. * @since 2.7.0 Can be used outside of the WordPress Loop if `$post` is provided. * * @param string|int|array $tag Optional. The tag name/term_id/slug, * or an array of them to check for. Default empty. * @param int|WP_Post $post Optional. Post to check. Defaults to the current post. * @return bool True if the current post has any of the given tags * (or any tag, if no tag specified). False otherwise. */ function has_tag( $tag = '', $post = null ) { return has_term( $tag, 'post_tag', $post ); } /** * Checks if the current post has any of given terms. * * The given terms are checked against the post's terms' term_ids, names and slugs. * Terms given as integers will only be checked against the post's terms' term_ids. * * If no terms are given, determines if post has any terms. * * @since 3.1.0 * * @param string|int|array $term Optional. The term name/term_id/slug, * or an array of them to check for. Default empty. * @param string $taxonomy Optional. Taxonomy name. Default empty. * @param int|WP_Post $post Optional. Post to check. Defaults to the current post. * @return bool True if the current post has any of the given terms * (or any term, if no term specified). False otherwise. */ function has_term( $term = '', $taxonomy = '', $post = null ) { $post = get_post( $post ); if ( ! $post ) { return false; } $r = is_object_in_term( $post->ID, $taxonomy, $term ); if ( is_wp_error( $r ) ) { return false; } return $r; } iven request has access to update a specific item. * * @since 4.7.0 * * @param WP_REST_Request $request Full details about the request. * @return true|WP_Error True if the request has access to update the item, WP_Error object otherwise. */ public function update_item_permissions_check( $request ) { return new WP_Error( 'invalid-method', /* translators: %s: Method name. */ sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ), array( 'status' => 405 ) ); } /** * Updates one item from the collection. * * @since 4.7.0 * * @param WP_REST_Request $request Full details about the request. * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure. */ public function update_item( $request ) { return new WP_Error( 'invalid-method', /* translators: %s: Method name. */ sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ), array( 'status' => 405 ) ); } /** * Checks if a given request has access to delete a specific item. * * @since 4.7.0 * * @param WP_REST_Request $request Full details about the request. * @return true|WP_Error True if the request has access to delete the item, WP_Error object otherwise. */ public function delete_item_permissions_check( $request ) { return new WP_Error( 'invalid-method', /* translators: %s: Method name. */ sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ), array( 'status' => 405 ) ); } /** * Deletes one item from the collection. * * @since 4.7.0 * * @param WP_REST_Request $request Full details about the request. * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure. */ public function delete_item( $request ) { return new WP_Error( 'invalid-method', /* translators: %s: Method name. */ sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ), array( 'status' => 405 ) ); } /** * Prepares one item for create or update operation. * * @since 4.7.0 * * @param WP_REST_Request $request Request object. * @return object|WP_Error The prepared item, or WP_Error object on failure. */ protected function prepare_item_for_database( $request ) { return new WP_Error( 'invalid-method', /* translators: %s: Method name. */ sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ), array( 'status' => 405 ) ); } /** * Prepares the item for the REST response. * * @since 4.7.0 * * @param mixed $item WordPress representation of the item. * @param WP_REST_Request $request Request object. * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure. */ public function prepare_item_for_response( $item, $request ) { return new WP_Error( 'invalid-method', /* translators: %s: Method name. */ sprintf( __( "Method '%s' not implemented. Must be overridden in subclass." ), __METHOD__ ), array( 'status' => 405 ) ); } /** * Prepares a response for insertion into a collection. * * @since 4.7.0 * * @param WP_REST_Response $response Response object. * @return array|mixed Response data, ready for insertion into collection data. */ public function prepare_response_for_collection( $response ) { if ( ! ( $response instanceof WP_REST_Response ) ) { return $response; } $data = (array) $response->get_data(); $server = rest_get_server(); $links = $server::get_compact_response_links( $response ); if ( ! empty( $links ) ) { $data['_links'] = $links; } return $data; } /** * Filters a response based on the context defined in the schema. * * @since 4.7.0 * * @param array $response_data Response data to filter. * @param string $context Context defined in the schema. * @return array Filtered response. */ public function filter_response_by_context( $response_data, $context ) { $schema = $this->get_item_schema(); return rest_filter_response_by_context( $response_data, $schema, $context ); } /** * Retrieves the item's schema, conforming to JSON Schema. * * @since 4.7.0 * * @return array Item schema data. */ public function get_item_schema() { return $this->add_additional_fields_schema( array() ); } /** * Retrieves the item's schema for display / public consumption purposes. * * @since 4.7.0 * * @return array Public item schema data. */ public function get_public_item_schema() { $schema = $this->get_item_schema(); if ( ! empty( $schema['properties'] ) ) { foreach ( $schema['properties'] as &$property ) { unset( $property['arg_options'] ); } } return $schema; } /** * Retrieves the query params for the collections. * * @since 4.7.0 * * @return array Query parameters for the collection. */ public function get_collection_params() { return array( 'context' => $this->get_context_param(), 'page' => array( 'description' => __( 'Current page of the collection.' ), 'type' => 'integer', 'default' => 1, 'sanitize_callback' => 'absint', 'validate_callback' => 'rest_validate_request_arg', 'minimum' => 1, ), 'per_page' => array( 'description' => __( 'Maximum number of items to be returned in result set.' ), 'type' => 'integer', 'default' => 10, 'minimum' => 1, 'maximum' => 100, 'sanitize_callback' => 'absint', 'validate_callback' => 'rest_validate_request_arg', ), 'search' => array( 'description' => __( 'Limit results to those matching a string.' ), 'type' => 'string', 'sanitize_callback' => 'sanitize_text_field', 'validate_callback' => 'rest_validate_request_arg', ), ); } /** * Retrieves the magical context param. * * Ensures consistent descriptions between endpoints, and populates enum from schema. * * @since 4.7.0 * * @param array $args Optional. Additional arguments for context parameter. Default empty array. * @return array Context parameter details. */ public function get_context_param( $args = array() ) { $param_details = array( 'description' => __( 'Scope under which the request is made; determines fields present in response.' ), 'type' => 'string', 'sanitize_callback' => 'sanitize_key', 'validate_callback' => 'rest_validate_request_arg', ); $schema = $this->get_item_schema(); if ( empty( $schema['properties'] ) ) { return array_merge( $param_details, $args ); } $contexts = array(); foreach ( $schema['properties'] as $attributes ) { if ( ! empty( $attributes['context'] ) ) { $contexts = array_merge( $contexts, $attributes['context'] ); } } if ( ! empty( $contexts ) ) { $param_details['enum'] = array_unique( $contexts ); rsort( $param_details['enum'] ); } return array_merge( $param_details, $args ); } /** * Adds the values from additional fields to a data object. * * @since 4.7.0 * * @param array $response_data Prepared response array. * @param WP_REST_Request $request Full details about the request. * @return array Modified data object with additional fields. */ protected function add_additional_fields_to_object( $response_data, $request ) { $additional_fields = $this->get_additional_fields(); $requested_fields = $this->get_fields_for_response( $request ); foreach ( $additional_fields as $field_name => $field_options ) { if ( ! $field_options['get_callback'] ) { continue; } if ( ! rest_is_field_included( $field_name, $requested_fields ) ) { continue; } $response_data[ $field_name ] = call_user_func( $field_options['get_callback'], $response_data, $field_name, $request, $this->get_object_type() ); } return $response_data; } /** * Updates the values of additional fields added to a data object. * * @since 4.7.0 * * @param object $data_object Data model like WP_Term or WP_Post. * @param WP_REST_Request $request Full details about the request. * @return true|WP_Error True on success, WP_Error object if a field cannot be updated. */ protected function update_additional_fields_for_object( $data_object, $request ) { $additional_fields = $this->get_additional_fields(); foreach ( $additional_fields as $field_name => $field_options ) { if ( ! $field_options['update_callback'] ) { continue; } // Don't run the update callbacks if the data wasn't passed in the request. if ( ! isset( $request[ $field_name ] ) ) { continue; } $result = call_user_func( $field_options['update_callback'], $request[ $field_name ], $data_object, $field_name, $request, $this->get_object_type() ); if ( is_wp_error( $result ) ) { return $result; } } return true; } /** * Adds the schema from additional fields to a schema array. * * The type of object is inferred from the passed schema. * * @since 4.7.0 * * @param array $schema Schema array. * @return array Modified Schema array. */ protected function add_additional_fields_schema( $schema ) { if ( empty( $schema['title'] ) ) { return $schema; } // Can't use $this->get_object_type otherwise we cause an inf loop. $object_type = $schema['title']; $additional_fields = $this->get_additional_fields( $object_type ); foreach ( $additional_fields as $field_name => $field_options ) { if ( ! $field_options['schema'] ) { continue; } $schema['properties'][ $field_name ] = $field_options['schema']; } return $schema; } /** * Retrieves all of the registered additional fields for a given object-type. * * @since 4.7.0 * * @global array $wp_rest_additional_fields Holds registered fields, organized by object type. * * @param string $object_type Optional. The object type. * @return array Registered additional fields (if any), empty array if none or if the object type * could not be inferred. */ protected function get_additional_fields( $object_type = null ) { global $wp_rest_additional_fields; if ( ! $object_type ) { $object_type = $this->get_object_type(); } if ( ! $object_type ) { return array(); } if ( ! $wp_rest_additional_fields || ! isset( $wp_rest_additional_fields[ $object_type ] ) ) { return array(); } return $wp_rest_additional_fields[ $object_type ]; } /** * Retrieves the object type this controller is responsible for managing. * * @since 4.7.0 * * @return string Object type for the controller. */ protected function get_object_type() { $schema = $this->get_item_schema(); if ( ! $schema || ! isset( $schema['title'] ) ) { return null; } return $schema['title']; } /** * Gets an array of fields to be included on the response. * * Included fields are based on item schema and `_fields=` request argument. * * @since 4.9.6 * * @param WP_REST_Request $request Full details about the request. * @return string[] Fields to be included in the response. */ public function get_fields_for_response( $request ) { $schema = $this->get_item_schema(); $properties = isset( $schema['properties'] ) ? $schema['properties'] : array(); $additional_fields = $this->get_additional_fields(); foreach ( $additional_fields as $field_name => $field_options ) { /* * For back-compat, include any field with an empty schema * because it won't be present in $this->get_item_schema(). */ if ( is_null( $field_options['schema'] ) ) { $properties[ $field_name ] = $field_options; } } // Exclude fields that specify a different context than the request context. $context = $request['context']; if ( $context ) { foreach ( $properties as $name => $options ) { if ( ! empty( $options['context'] ) && ! in_array( $context, $options['context'], true ) ) { unset( $properties[ $name ] ); } } } $fields = array_keys( $properties ); /* * '_links' and '_embedded' are not typically part of the item schema, * but they can be specified in '_fields', so they are added here as a * convenience for checking with rest_is_field_included(). */ $fields[] = '_links'; if ( $request->has_param( '_embed' ) ) { $fields[] = '_embedded'; } $fields = array_unique( $fields ); if ( ! isset( $request['_fields'] ) ) { return $fields; } $requested_fields = wp_parse_list( $request['_fields'] ); if ( 0 === count( $requested_fields ) ) { return $fields; } // Trim off outside whitespace from the comma delimited list. $requested_fields = array_map( 'trim', $requested_fields ); // Always persist 'id', because it can be needed for add_additional_fields_to_object(). if ( in_array( 'id', $fields, true ) ) { $requested_fields[] = 'id'; } // Return the list of all requested fields which appear in the schema. return array_reduce( $requested_fields, static function ( $response_fields, $field ) use ( $fields ) { if ( in_array( $field, $fields, true ) ) { $response_fields[] = $field; return $response_fields; } // Check for nested fields if $field is not a direct match. $nested_fields = explode( '.', $field ); /* * A nested field is included so long as its top-level property * is present in the schema. */ if ( in_array( $nested_fields[0], $fields, true ) ) { $response_fields[] = $field; } return $response_fields; }, array() ); } /** * Retrieves an array of endpoint arguments from the item schema for the controller. * * @since 4.7.0 * * @param string $method Optional. HTTP method of the request. The arguments for `CREATABLE` requests are * checked for required values and may fall-back to a given default, this is not done * on `EDITABLE` requests. Default WP_REST_Server::CREATABLE. * @return array Endpoint arguments. */ public function get_endpoint_args_for_item_schema( $method = WP_REST_Server::CREATABLE ) { return rest_get_endpoint_args_for_schema( $this->get_item_schema(), $method ); } /** * Sanitizes the slug value. * * @since 4.7.0 * * @internal We can't use sanitize_title() directly, as the second * parameter is the fallback title, which would end up being set to the * request object. * * @see https://github.com/WP-API/WP-API/issues/1585 * * @todo Remove this in favour of https://core.trac.wordpress.org/ticket/34659 * * @param string $slug Slug value passed in request. * @return string Sanitized value for the slug. */ public function sanitize_slug( $slug ) { return sanitize_title( $slug ); } }