获取用户的metas值：

$user_meta = get_user_meta($user_id, \'YOUR_META_KEY\', TRUE); //You have to set the $user_id / And the "YOUR_META_KEY" can be description, name, custom meta...

function commentCount($userId = null) {
    global $wpdb;

    if($userId == null) return 0;

    $count = $wpdb->get_var(\'
             SELECT COUNT(comment_ID) 
             FROM \' . $wpdb->comments. \' 
             WHERE user_id = "\' . $userId . \'"\');
    return (int)$count;
}

$user_post_count = count_user_posts( $userId , \'post\' );