写一个循环并浏览每个评论是我可以提供给你的选择。看看这个例子：

function get_comment_authors($post_ID){
    // Get every comment on this post
    $args = array(
        \'post_id\' => $post_ID
    );
    $comment_objects = get_comments( $args );
    // Define an empty array to store the comments
    $author_array = array();
    // Run a loop through every comment object
    foreach ( $comment_objects as $comment ) {
        // Get the comment\'s author
        $author_array[] = $comment->comment_author;
    }
    // Return the authors as an array
    return $author_array;
}