php使用正则替换过滤掉js(script)脚本例子
利用php中的preg_replace正则匹配函数过滤掉网页中的js代码,preg_replace()中的第四个参数中表示替换的次数,默认是-1,表示替换全部;如果只想替换2次,可以写为 preg_replace($p1,$p2,$p3,2)。
匹配的规则不能用 "/
源码范例:
<?php header("Content-type:text/html;charset=utf-8"); $str = '<script type="text/javascript" src="dd.js"></script> 测试php正则匹配掉js代码<script type="text/javascript" src="123.js"></script> <script type="text/javascript"> var aa = "sdsds"; alert(aa); </script> 测试php正则匹配掉js代码'; $preg = "/\script[sS]*?<\/script>/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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