Modificacion de la funcion wp_list_authors de WordPress para que muestre autores con imagen

dcms_list_authors.php

<?php
function dcms_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 ) {
        $posts = isset( $author_count[ $author_id ] ) ? $author_count[ $author_id ] : 0;

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

        $author = get_userdata( $author_id );

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

		$link = '<img src="' . get_avatar_url($author_id, ['size' => '16']) . '" style="border: none;"' . $name . ' />';

        $link .= sprintf(
            '<a href="%1$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 .= '>';

            $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'] ) {
        echo $return;
    } else {
        return $return;
    }
}