PHP implements filtering sensitive words in message messages

PHP implements filtering sensitive words in message messages

One code

     
  
 
 
 
 
 
 姓 名：  *
 
 
 
 标 题：  *
 
 
 
 内 容：  *
 
 
 
 
 
 
 
 
 
 
  
    alert('留言信息中包含敏感词！');history.back(-1);"; exit; } } } } ?>

Two running results

Three code analysis

When the user submits a message, the program will use the regular expression preg_mctch() function to compare the message information with the sensitive words stored in the array to check whether the message submitted by the user contains Sensitive words. If the message contains sensitive words, a prompt message will pop up, otherwise the message information will be published successfully.

The "/i" in the preg_match() function means that letters are not case-sensitive when comparing sensitive words.

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