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php使用正则过滤js脚本代码实例_php实例

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Release： 2016-06-07 17:19:57
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匹配的规则不能用 "//i",因为它不能匹配到换行符，那么多行js就匹配不掉了。要用 "/<script>/i"。里面的?表示尽可能少重复，也就是匹配最近的一个</script>。

源码范例：

复制代码 代码如下:


 header("Content-type:text/html;charset=utf-8");
 $str = '
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 = "/<script>/i";<BR> $newstr = preg_replace($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<BR> echo $newstr;</script>

?>

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