wp_list_authors() WP 1.0

List all the authors of the site, with several options available.

No Hooks.

Return

String/null. The output, if echo is set to false.

Usage

wp_list_authors( $args );

$args(string/array)

Array or string of default arguments.

• $orderby (string)
  How to sort the authors. Accepts 'nicename', 'email', 'url', 'registered', 'user_nicename', 'user_email', 'user_url', 'user_registered', 'name', 'display_name', 'post_count', 'ID', 'meta_value', 'user_login'.
  Default: 'name'

• $order (string)
  Sorting direction for $orderby. Accepts 'ASC', 'DESC'.
  Default: 'ASC'

• $number (int)
  Maximum authors to return or display.
  Default: empty (all authors)

• $optioncount (true/false)
  Show the count in parenthesis next to the author's name.
  Default: false

• $exclude_admin (true/false)
  Whether to exclude the 'admin' account, if it exists.
  Default: false

• $show_fullname (true/false)
  Whether to show the author's full name.
  Default: false

• $hide_empty (true/false)
  Whether to hide any authors with no posts.
  Default: true

• $feed (string)
  If not empty, show a link to the author's feed and use this text as the alt parameter of the link.
  Default: ''

• $feed_image (string)
  If not empty, show a link to the author's feed and use this image URL as clickable anchor.
  Default: ''

• $feed_type (string)
  The feed type to link to, such as 'rss2'.
  Default: default feed type

• $echo (true/false)
  Whether to output the result or instead return it.
  Default: true

• $style (string)
  If 'list', each author is wrapped in an <li> element, otherwise the authors will be separated by commas.

• $html (true/false)
  Whether to list the items in HTML form or plaintext.
  Default: true

• $exclude (array/string)
  Array or comma/space-separated list of author IDs to exclude.
  Default: ''

• $include (array/string)
  Array or comma/space-separated list of author IDs to include.
  Default: ''

Default: ''

Code of wp list authors: wp-includes/author-template.php ^{VER 5.0.3}

<?php
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' => ''
	);

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

	$return = '';

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

	$author_count = array();
	foreach ( (array) $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" ) as $row ) {
		$author_count[$row->post_author] = $row->count;
	}
	foreach ( $authors as $author_id ) {
		$author = get_userdata( $author_id );

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

		$posts = isset( $author_count[$author->ID] ) ? $author_count[$author->ID] : 0;

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

		if ( $args['show_fullname'] && $author->first_name && $author->last_name ) {
			$name = "$author->first_name $author->last_name";
		} else {
			$name = $author->display_name;
		}

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

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

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

		$link = sprintf( '<a href="%1$s" title="%2$s">%3$s</a>',
			get_author_posts_url( $author->ID, $author->user_nicename ),
			/* translators: %s: author's display name */
			esc_attr( sprintf( __( 'Posts by %s' ), $author->display_name ) ),
			$name
		);

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

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

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

			$link .= '>';

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

			$link .= '</a>';

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

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

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

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

	if ( ! $args['echo'] ) {
		return $return;
	}
	echo $return;
}

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