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<?php /** * Taxonomy API: Core category-specific template tags * * @package WordPress * @subpackage Template * @since 1.2.0 / /* * Retrieves category link URL. * * @since 1.0.0 * * @see get_term_link() * * @param int\|object $category Category ID or object. * @return string Link on success, empty string if category does not exist. / function get_category_link( $category ) { if ( ! is_object( $category ) ) { $category = (int) $category; } $category = get_term_link( $category ); if ( is_wp_error( $category ) ) { return ''; } return $category; } /* * Retrieves category parents with separator. * * @since 1.2.0 * @since 4.8.0 The `$visited` parameter was deprecated and renamed to `$deprecated`. * * @param int $category_id Category ID. * @param bool $link Optional. Whether to format with link. Default false. * @param string $separator Optional. How to separate categories. Default '/'. * @param bool $nicename Optional. Whether to use nice name for display. Default false. * @param array $deprecated Not used. * @return string\|WP_Error A list of category parents on success, WP_Error on failure. / function get_category_parents( $category_id, $link = false, $separator = '/', $nicename = false, $deprecated = array() ) { if ( ! empty( $deprecated ) ) { _deprecated_argument( __FUNCTION__, '4.8.0' ); } $format = $nicename ? 'slug' : 'name'; $args = array( 'separator' => $separator, 'link' => $link, 'format' => $format, ); return get_term_parents_list( $category_id, 'category', $args ); } /* * Retrieves 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 $post_id Optional. The post ID. Defaults to current post ID. * @return WP_Term[] Array of WP_Term objects, one for each category assigned to the post. / function get_the_category( $post_id = false ) { $categories = get_the_terms( $post_id, 'category' ); if ( ! $categories \|\| is_wp_error( $categories ) ) { $categories = array(); } $categories = array_values( $categories ); foreach ( array_keys( $categories ) as $key ) { _make_cat_compat( $categories[ $key ] ); } /* * Filters the array of categories to return for a post. * * @since 3.1.0 * @since 4.4.0 Added the `$post_id` parameter. * * @param WP_Term[] $categories An array of categories to return for the post. * @param int\|false $post_id The post ID. / return apply_filters( 'get_the_categories', $categories, $post_id ); } /* * Retrieves category name based on category ID. * * @since 0.71 * * @param int $cat_id Category ID. * @return string\|WP_Error Category name on success, WP_Error on failure. / function get_the_category_by_ID( $cat_id ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid $cat_id = (int) $cat_id; $category = get_term( $cat_id ); if ( is_wp_error( $category ) ) { return $category; } return ( $category ) ? $category->name : ''; } /* * Retrieves category list for a post in either HTML list or custom format. * * Generally used for quick, delimited (e.g. comma-separated) lists of categories, * as part of a post entry meta. * * For a more powerful, list-based function, see wp_list_categories(). * * @since 1.5.1 * * @see wp_list_categories() * * @global WP_Rewrite $wp_rewrite WordPress rewrite component. * * @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. * @return string Category list for a post. / 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 .= '<ul class="post-categories">'; foreach ( $categories as $category ) { $thelist .= "\n\t<li>"; switch ( strtolower( $parents ) ) { case 'multiple': if ( $category->parent ) { $thelist .= get_category_parents( $category->parent, true, $separator ); } $thelist .= '<a href="' . esc_url( get_category_link( $category->term_id ) ) . '" ' . $rel . '>' . $category->name . '</a></li>'; break; case 'single': $thelist .= '<a href="' . esc_url( get_category_link( $category->term_id ) ) . '" ' . $rel . '>'; if ( $category->parent ) { $thelist .= get_category_parents( $category->parent, false, $separator ); } $thelist .= $category->name . '</a></li>'; break; case '': default: $thelist .= '<a href="' . esc_url( get_category_link( $category->term_id ) ) . '" ' . $rel . '>' . $category->name . '</a></li>'; } } $thelist .= '</ul>'; } 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 .= '<a href="' . esc_url( get_category_link( $category->term_id ) ) . '" ' . $rel . '>' . $category->name . '</a>'; break; case 'single': $thelist .= '<a href="' . esc_url( get_category_link( $category->term_id ) ) . '" ' . $rel . '>'; if ( $category->parent ) { $thelist .= get_category_parents( $category->parent, false, $separator ); } $thelist .= "$category->name</a>"; break; case '': default: $thelist .= '<a href="' . esc_url( get_category_link( $category->term_id ) ) . '" ' . $rel . '>' . $category->name . '</a>'; } ++$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 `<select>` element should have the HTML5 'required' attribute. * Default false. * @type Walker $walker Walker object to use to build the output. Default empty which results in a * Walker_CategoryDropdown instance being used. * @type string $aria_describedby The 'id' of an element that contains descriptive text for the select. * Default empty string. * } * @return string HTML dropdown list of categories. / function wp_dropdown_categories( $args = '' ) { $defaults = array( 'show_option_all' => '', 'show_option_none' => '', 'orderby' => 'id', 'order' => 'ASC', 'show_count' => 0, 'hide_empty' => 1, 'child_of' => 0, 'exclude' => '', 'echo' => 1, 'selected' => 0, 'hierarchical' => 0, 'name' => 'cat', 'id' => '', 'class' => 'postform', 'depth' => 0, 'tab_index' => 0, 'taxonomy' => 'category', 'hide_if_empty' => false, 'option_none_value' => -1, 'value_field' => 'term_id', 'required' => false, 'aria_describedby' => '', ); $defaults['selected'] = ( is_category() ) ? get_query_var( 'cat' ) : 0; // Back compat. if ( isset( $args['type'] ) && 'link' === $args['type'] ) { _deprecated_argument( __FUNCTION__, '3.0.0', sprintf( / translators: 1: "type => link", 2: "taxonomy => link_category" / __( '%1$s is deprecated. Use %2$s instead.' ), '<code>type => link</code>', '<code>taxonomy => link_category</code>' ) ); $args['taxonomy'] = 'link_category'; } // Parse incoming $args into an array and merge it with $defaults. $parsed_args = wp_parse_args( $args, $defaults ); $option_none_value = $parsed_args['option_none_value']; if ( ! isset( $parsed_args['pad_counts'] ) && $parsed_args['show_count'] && $parsed_args['hierarchical'] ) { $parsed_args['pad_counts'] = true; } $tab_index = $parsed_args['tab_index']; $tab_index_attribute = ''; if ( (int) $tab_index > 0 ) { $tab_index_attribute = " tabindex=\"$tab_index\""; } // Avoid clashes with the 'name' param of get_terms(). $get_terms_args = $parsed_args; unset( $get_terms_args['name'] ); $categories = get_terms( $get_terms_args ); $name = esc_attr( $parsed_args['name'] ); $class = esc_attr( $parsed_args['class'] ); $id = $parsed_args['id'] ? esc_attr( $parsed_args['id'] ) : $name; $required = $parsed_args['required'] ? 'required' : ''; $aria_describedby_attribute = $parsed_args['aria_describedby'] ? ' aria-describedby="' . esc_attr( $parsed_args['aria_describedby'] ) . '"' : ''; if ( ! $parsed_args['hide_if_empty'] \|\| ! empty( $categories ) ) { $output = "<select $required name='$name' id='$id' class='$class'$tab_index_attribute$aria_describedby_attribute>\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<option value='" . esc_attr( $option_none_value ) . "' selected='selected'>$show_option_none</option>\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'" : ''; $output .= "\t<option value='0'$selected>$show_option_all</option>\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<option value='" . esc_attr( $option_none_value ) . "'$selected>$show_option_none</option>\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 .= "</select>\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 '<br />'. * @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 `<br>` 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 `<li>` 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' => '<br />', '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 = '<li class="' . esc_attr( $parsed_args['class'] ) . '">' . $parsed_args['title_li'] . '<ul>'; } if ( empty( $categories ) ) { if ( ! empty( $show_option_none ) ) { if ( 'list' === $parsed_args['style'] ) { $output .= '<li class="cat-item-none">' . $show_option_none . '</li>'; } else { $output .= $show_option_none; } } } else { if ( ! empty( $show_option_all ) ) { $posts_page = ''; // For taxonomies that belong only to custom post types, point to a valid archive. $taxonomy_object = get_taxonomy( $parsed_args['taxonomy'] ); if ( ! in_array( 'post', $taxonomy_object->object_type, true ) && ! in_array( 'page', $taxonomy_object->object_type, true ) ) { 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' === $parsed_args['style'] ) { $output .= "<li class='cat-item-all'><a href='$posts_page'>$show_option_all</a></li>"; } else { $output .= "<a href='$posts_page'>$show_option_all</a>"; } } if ( empty( $parsed_args['current_category'] ) && ( is_category() \|\| is_tax() \|\| is_tag() ) ) { $current_term_object = get_queried_object(); if ( $current_term_object && $parsed_args['taxonomy'] === $current_term_object->taxonomy ) { $parsed_args['current_category'] = get_queried_object_id(); } } if ( $parsed_args['hierarchical'] ) { $depth = $parsed_args['depth']; } else { $depth = -1; // Flat. } $output .= walk_category_tree( $categories, $depth, $parsed_args ); } if ( $parsed_args['title_li'] && 'list' === $parsed_args['style'] && ( ! empty( $categories ) \|\| ! $parsed_args['hide_title_if_empty'] ) ) { $output .= '</ul></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'] ? '<span class="tag-link-count"> (' . $real_count . ')</span>' : '', ); } /** * 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 ); $a[] = sprintf( '<a href="%1$s"%2$s class="%3$s" style="font-size: %4$s;"%5$s>%6$s%7$s</a>', 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 = "<ul class='wp-tag-cloud' role='list'>\n\t<li>"; $return .= implode( "</li>\n\t<li>", $a ); $return .= "</li>\n</ul>\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[] = '<a href="' . esc_url( $link ) . '" rel="tag">' . $term->name . '</a>'; } /* * Filters the term links for a given taxonomy. * * The dynamic portion of the hook name, `$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 .= '<a href="' . esc_url( get_term_link( $parent->term_id, $taxonomy ) ) . '">' . $name . '</a>' . $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; }

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