Adding upstream version 6.4.3+dfsg1.upstream/6.4.3+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1555 insertions, 0 deletions

diff --git a/wp-includes/category-template.php b/wp-includes/category-template.php
new file mode 100644
index 0000000..0525ae7
--- /dev/null
+++ b/wp-includes/category-template.php
@@ -0,0 +1,1555 @@
+<?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;
+}