WordPress 禁止不包含中文的评论

/**

    *WordPress 禁止不包含中文的评论

    *https://www.weixiaoduo.com/spam-chinese-comment/

*/

functionBing_spam_chinese_comment($comment){

    $pattern='/[一-龥]/u';

    if(!preg_match($pattern,$comment['comment_content']))wp_die(__('请在评论里包含中文','Bing'));

    return$comment;

}

add_filter('preprocess_comment','Bing_spam_chinese_comment');