怎么实现显示某个WordPress文章所有评论者的名称

function get_comment_authors_list( $id = 0, $sep = ', ' ) {
$post_id = $id ? $id : get_the_ID();
if ( $post_id ) {
$comments = get_comments( array(
'post_id' => $post_id,
'status'  => 'approve',
'type'    => 'comment',
) );
 
$names = array();
foreach ( $comments as $comment ) {
$name = $comment->comment_author;
if ( $comment->user_id ) {
$user = get_userdata( $comment->user_id );
$name = $user ? $user->display_name : $name;
}
 
$arr = explode( ' ', trim( $name ) );
if ( ! empty( $arr[0] ) && ! in_array( $arr[0], $names ) ) {
$names[] = $arr[0];
}
}
unset( $comments );
 
$sep = $sep ? $sep : ', ';
return implode( $sep, $names );
}
}
 
 
add_shortcode( 'comment_authors_list', 'comment_authors_list_shortcode' );
 
function comment_authors_list_shortcode( $atts = array() ) {
$atts = shortcode_atts( array(
'post_id'  => 0,
'list_sep' => '',
), $atts );
 
return get_comment_authors_list( $atts['post_id'], $atts['list_sep'] );
}

<?php echo get_comment_authors_list('123'); ?>

[comment_authors_list post_id="123" /]

<?php echo get_comment_authors_list(); ?>

[comment_authors_list /]