Filter spam comment in Typecho, file path: /var/Widget/Feedback.php, line 82

Feedback.php

<?php
        if(!$this->user->hasLogin()) {
          /** 过滤纯英文评论 */
          $pattern = '/[\x{4E00}-\x{9FA5}]/u';
          if (!preg_match($pattern, $comment['text'], $match)) {
            throw new Typecho_Widget_Exception(_t('You should type some Chinese word (like "你好") in your comment to pass the spam-check, thanks for your patience!<br />您的评论中必须包含汉字!<p><a style="color:#FFF; border: 1px solid;text-decoration:none;padding:0px 2px" href="javascript:void(history.back())">点此返回</a></p>'));
          }
          
          /** 过滤包含日文的评论 */
          $pattern = '/[\x{3040}-\x{31FF}]/u';
          if (preg_match($pattern, $comment['text'], $match)) {
            throw new Typecho_Widget_Exception(_t('You can not contains Japenese word in your comment to pass the spam-check, thanks for your patience!<br />您的评论中不能包含日文!<p><a style="color:#FFF; border: 1px solid;text-decoration:none;padding:0px 2px" href="javascript:void(history.back())">点此返回</a></p>'));
          }
        }
?>