// 禁止无中文留言
if ( is_user_logged_in() ) {
} else {
function refused_spam_comments( $comment_data ) {
	$pattern = '/[一-龥]/u';
	if(!preg_match($pattern,$comment_data['comment_content'])) {
		err('评论必须含中文！');
	}
	return( $comment_data );
}
add_filter('preprocess_comment','refused_spam_comments');
}