How to remove js from php regular code

How to remove js using php regular rules: 1. Create a PHP sample file; 2. Use the preg_replace regular matching function in php to filter out the js code in the web page.

#The operating environment of this article: Windows7 system, PHP7.1, Dell G3 computer.

How to remove js from regular php?

php uses regular replacement to filter out the js (script) code

Use the preg_replace regular matching function in php to filter out the js code in the web page, preg_replace( ) represents the number of replacements. The default is -1, which means replacing all. If you only want to replace 2 times, you can write preg_replace($p1,$p2,$p3,2).

The matching rule cannot use "/ /i" because it cannot match newline characters, so multiple lines of js cannot be matched. . Use "/.

Source code example:

 测试php正则匹配掉js代码测试php正则匹配掉js代码测试php正则匹配掉js代码测试php正则匹配掉js代码测试php正则匹配掉js代码测试php正则匹配掉js代码   测试php正则匹配掉js代码'; $preg = "//i"; $newstr = preg_replace($preg,"",$str,3); //第四个参数中的3表示替换3次，默认是-1，替换全部 echo $newstr; ?>

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