'user_nicename', 'user_email', 'user_url', 'user_registered', 'name',
 *                                       'display_name', 'post_count', 'ID', 'meta_value', 'user_login'. Default 'name'.
 *     @type string       $order         Sorting direction for $orderby. Accepts 'ASC', 'DESC'. Default 'ASC'.
 *     @type int          $number        Maximum authors to return or display. Default empty (all authors).
 *     @type bool         $optioncount   Show the count in parenthesis next to the author's name. Default false.
 *     @type bool         $exclude_admin Whether to exclude the 'admin' account, if it exists. Default true.
 *     @type bool         $show_fullname Whether to show the author's full name. Default false.
 *     @type bool         $hide_empty    Whether to hide any authors with no posts. Default true.
 *     @type string       $feed          If not empty, show a link to the author's feed and use this text as the alt
 *                                       parameter of the link. Default empty.
 *     @type string       $feed_image    If not empty, show a link to the author's feed and use this image URL as
 *                                       clickable anchor. Default empty.
 *     @type string       $feed_type     The feed type to link to. Possible values include 'rss2', 'atom'.
 *                                       Default is the value of get_default_feed().
 *     @type bool         $echo          Whether to output the result or instead return it. Default true.
 *     @type string       $style         If 'list', each author is wrapped in an `<li>` element, otherwise the authors
 *                                       will be separated by commas.
 *     @type bool         $html          Whether to list the items in HTML form or plaintext. Default true.
 *     @type int[]|string $exclude       Array or comma/space-separated list of author IDs to exclude. Default empty.
 *     @type int[]|string $include       Array or comma/space-separated list of author IDs to include. Default empty.
 * }
 * @return void|string Void if 'echo' argument is true, list of authors if 'echo' is false.
 */
function wp_list_authors( $args = '' ) {
	global $wpdb;

	$defaults = array(
		'orderby'       => 'name',
		'order'         => 'ASC',
		'number'        => '',
		'optioncount'   => false,
		'exclude_admin' => true,
		'show_fullname' => false,
		'hide_empty'    => true,
		'feed'          => '',
		'feed_image'    => '',
		'feed_type'     => '',
		'echo'          => true,
		'style'         => 'list',
		'html'          => true,
		'exclude'       => '',
		'include'       => '',
	);

	$parsed_args = wp_parse_args( $args, $defaults );

	$return = '';

	$query_args           = wp_array_slice_assoc( $parsed_args, array( 'orderby', 'order', 'number', 'exclude', 'include' ) );
	$query_args['fields'] = 'ids';

	/**
	 * Filters the query arguments for the list of all authors of the site.
	 *
	 * @since 6.1.0
	 *
	 * @param array $query_args  The query arguments for get_users().
	 * @param array $parsed_args The arguments passed to wp_list_authors() combined with the defaults.
	 */
	$query_args = apply_filters( 'wp_list_authors_args', $query_args, $parsed_args );

	$authors = get_users( $query_args );

	/**
	 * Filters whether to short-circuit performing the query for author post counts.
	 *
	 * @since 6.1.0
	 *
	 * @param int[]|false $post_counts Array of post counts, keyed by author ID.
	 * @param array       $parsed_args The arguments passed to wp_list_authors() combined with the defaults.
	 */
	$post_counts = apply_filters( 'pre_wp_list_authors_post_counts_query', false, $parsed_args );

	if ( ! is_array( $post_counts ) ) {
		$post_counts       = array();
		$post_counts_query = $wpdb->get_results(
			"SELECT DISTINCT post_author, COUNT(ID) AS count
			FROM $wpdb->posts
			WHERE " . get_private_posts_cap_sql( 'post' ) . '
			GROUP BY post_author'
		);

		foreach ( (array) $post_counts_query as $row ) {
			$post_counts[ $row->post_author ] = $row->count;
		}
	}

	foreach ( $authors as $author_id ) {
		$posts = $post_counts[ $author_id ] ?? 0;

		if ( ! $posts && $parsed_args['hide_empty'] ) {
			continue;
		}

		$author = get_userdata( $author_id );

		if ( $parsed_args['exclude_admin'] && 'admin' === $author->display_name ) {
			continue;
		}

		if ( $parsed_args['show_fullname'] && $author->first_name && $author->last_name ) {
			$name = sprintf(
				/* translators: 1: User's first name, 2: Last name. */
				_x( '%1$s %2$s', 'Display name based on first name and last name' ),
				$author->first_name,
				$author->last_name
			);
		} else {
			$name = $author->display_name;
		}

		if ( ! $parsed_args['html'] ) {
			$return .= $name . ', ';

			continue; // No need to go further to process HTML.
		}

		if ( 'list' === $parsed_args['style'] ) {
			$return .= '<li>';
		}

		$link = sprintf(
			'<a href="%1$s">%2$s</a>',
			esc_url( get_author_posts_url( $author->ID, $author->user_nicename ) ),
			$name
		);

		if ( ! empty( $parsed_args['feed_image'] ) || ! empty( $parsed_args['feed'] ) ) {
			$link .= ' ';
			if ( empty( $parsed_args['feed_image'] ) ) {
				$link .= '(';
			}

			$link .= '<a href="' . get_author_feed_link( $author->ID, $parsed_args['feed_type'] ) . '"';

			$alt = '';
			if ( ! empty( $parsed_args['feed'] ) ) {
				$alt  = ' alt="' . esc_attr( $parsed_args['feed'] ) . '"';
				$name = $parsed_args['feed'];
			}

			$link .= '>';

			if ( ! empty( $parsed_args['feed_image'] ) ) {
				$link .= '<img src="' . esc_url( $parsed_args['feed_image'] ) . '" style="border: none;"' . $alt . ' />';
			} else {
				$link .= $name;
			}

			$link .= '</a>';

			if ( empty( $parsed_args['feed_image'] ) ) {
				$link .= ')';
			}
		}

		if ( $parsed_args['optioncount'] ) {
			$link .= ' (' . $posts . ')';
		}

		$return .= $link;
		$return .= ( 'list' === $parsed_args['style'] ) ? '</li>' : ', ';
	}

	$return = rtrim( $return, ', ' );

	if ( $parsed_args['echo'] ) {
		echo $return;
	} else {
		return $return;
	}
}

/**
 * Determines whether this site has more than one author.
 *
 * Checks to see if more than one author has published posts.
 *
 * 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 3.2.0
 *
 * @global wpdb $wpdb WordPress database abstraction object.
 *
 * @return bool Whether or not we have more than one author
 */
function is_multi_author() {
	global $wpdb;

	$is_multi_author = get_transient( 'is_multi_author' );
	if ( false === $is_multi_author ) {
		$rows            = (array) $wpdb->get_col( "SELECT DISTINCT post_author FROM $wpdb->posts WHERE post_type = 'post' AND post_status = 'publish' LIMIT 2" );
		$is_multi_author = 1 < count( $rows ) ? 1 : 0;
		set_transient( 'is_multi_author', $is_multi_author );
	}

	/**
	 * Filters whether the site has more than one author with published posts.
	 *
	 * @since 3.2.0
	 *
	 * @param bool $is_multi_author Whether $is_multi_author should evaluate as true.
	 */
	return apply_filters( 'is_multi_author', (bool) $is_multi_author );
}

/**
 * Helper function to clear the cache for number of authors.
 *
 * @since 3.2.0
 * @access private
 */
function __clear_multi_author_cache() { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionDoubleUnderscore,PHPCompatibility.FunctionNameRestrictions.ReservedFunctionNames.FunctionDoubleUnderscore
	delete_transient( 'is_multi_author' );
}
 Term data object.
		 * @param int     $depth             Depth of category, used for padding.
		 * @param array   $args              An array of arguments.
		 * @param int     $current_object_id ID of the current category.
		 */
		$atts = apply_filters( 'category_list_link_attributes', $atts, $category, $depth, $args, $current_object_id );

		$attributes = '';
		foreach ( $atts as $attr => $value ) {
			if ( is_scalar( $value ) && '' !== $value && false !== $value ) {
				$value       = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
				$attributes .= ' ' . $attr . '="' . $value . '"';
			}
		}

		$link = sprintf(
			'<a%s>%s</a>',
			$attributes,
			$cat_name
		);

		if ( ! empty( $args['feed_image'] ) || ! empty( $args['feed'] ) ) {
			$link .= ' ';

			if ( empty( $args['feed_image'] ) ) {
				$link .= '(';
			}

			$link .= '<a href="' . esc_url( get_term_feed_link( $category, $category->taxonomy, $args['feed_type'] ) ) . '"';

			if ( empty( $args['feed'] ) ) {
				/* translators: %s: Category name. */
				$alt = ' alt="' . sprintf( __( 'Feed for all posts filed under %s' ), $cat_name ) . '"';
			} else {
				$alt   = ' alt="' . $args['feed'] . '"';
				$name  = $args['feed'];
				$link .= empty( $args['title'] ) ? '' : $args['title'];
			}

			$link .= '>';

			if ( empty( $args['feed_image'] ) ) {
				$link .= $name;
			} else {
				$link .= "<img src='" . esc_url( $args['feed_image'] ) . "'$alt" . ' />';
			}

			$link .= '</a>';

			if ( empty( $args['feed_image'] ) ) {
				$link .= ')';
			}
		}

		if ( ! empty( $args['show_count'] ) ) {
			$link .= ' (' . number_format_i18n( $category->count ) . ')';
		}

		if ( 'list' === $args['style'] ) {
			$output     .= "\t<li";
			$css_classes = array(
				'cat-item',
				'cat-item-' . $category->term_id,
			);

			if ( ! empty( $args['current_category'] ) ) {
				// 'current_category' can be an array, so we use `get_terms()`.
				$_current_terms = get_terms(
					array(
						'taxonomy'   => $category->taxonomy,
						'include'    => $args['current_category'],
						'hide_empty' => false,
					)
				);

				foreach ( $_current_terms as $_current_term ) {
					if ( $category->term_id === $_current_term->term_id ) {
						$css_classes[] = 'current-cat';
						$link          = str_replace( '<a', '<a aria-current="page"', $link );
					} elseif ( $category->term_id === $_current_term->parent ) {
						$css_classes[] = 'current-cat-parent';
					}

					while ( $_current_term->parent ) {
						if ( $category->term_id === $_current_term->parent ) {
							$css_classes[] = 'current-cat-ancestor';
							break;
						}

						$_current_term = get_term( $_current_term->parent, $category->taxonomy );
					}
				}
			}

			/**
			 * Filters the list of CSS classes to include with each category in the list.
			 *
			 * @since 4.2.0
			 *
			 * @see wp_list_categories()
			 *
			 * @param string[] $css_classes An array of CSS classes to be applied to each list item.
			 * @param WP_Term  $category    Category data object.
			 * @param int      $depth       Depth of page, used for padding.
			 * @param array    $args        An array of wp_list_categories() arguments.
			 */
			$css_classes = implode( ' ', apply_filters( 'category_css_class', $css_classes, $category, $depth, $args ) );
			$css_classes = $css_classes ? ' class="' . esc_attr( $css_classes ) . '"' : '';

			$output .= $css_classes;
			$output .= ">$link\n";
		} elseif ( isset( $args['separator'] ) ) {
			$output .= "\t$link" . $args['separator'] . "\n";
		} else {
			$output .= "\t$link<br />\n";
		}
	}

	/**
	 * Ends the element output, if needed.
	 *
	 * @since 2.1.0
	 * @since 5.9.0 Renamed `$page` to `$data_object` to match parent class for PHP 8 named parameter support.
	 *
	 * @see Walker::end_el()
	 *
	 * @param string $output      Used to append additional content (passed by reference).
	 * @param object $data_object Category data object. Not used.
	 * @param int    $depth       Optional. Depth of category. Not used.
	 * @param array  $args        Optional. An array of arguments. Only uses 'list' for whether should
	 *                            append to output. See wp_list_categories(). Default empty array.
	 */
	public function end_el( &$output, $data_object, $depth = 0, $args = array() ) {
		if ( 'list' !== $args['style'] ) {
			return;
		}

		$output .= "</li>\n";
	}
}