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  • PHP过滤常用标签的正则表达式

    <?php
    $str=preg_replace("/s+/", " ", $str); //过滤多余回车
    $str=preg_replace("/<[ ]+/si","<",$str); //过滤<__("<"号后面带空格)
    $str=preg_replace("/<!–.*?–>/si","",$str); //注释
    $str=preg_replace("/<(!.*?)>/si","",$str); //过滤DOCTYPE
    $str=preg_replace("/<(/?html.*?)>/si","",$str); //过滤html标签
    $str=preg_replace("/<(/?br.*?)>/si","",$str); //过滤br标签
    $str=preg_replace("/<(/?head.*?)>/si","",$str); //过滤head标签
    $str=preg_replace("/<(/?meta.*?)>/si","",$str); //过滤meta标签
    $str=preg_replace("/<(/?body.*?)>/si","",$str); //过滤body标签
    $str=preg_replace("/<(/?link.*?)>/si","",$str); //过滤link标签
    $str=preg_replace("/<(/?form.*?)>/si","",$str); //过滤form标签
    $str=preg_replace("/cookie/si","COOKIE",$str); //过滤COOKIE标签
    $str=preg_replace("/<(applet.*?)>(.*?)<(/applet.*?)>/si","",$str); //过滤applet标签
    $str=preg_replace("/<(/?applet.*?)>/si","",$str); //过滤applet标签
    $str=preg_replace("/<(style.*?)>(.*?)<(/style.*?)>/si","",$str); //过滤style标签
    $str=preg_replace("/<(/?style.*?)>/si","",$str); //过滤style标签
    $str=preg_replace("/<(title.*?)>(.*?)<(/title.*?)>/si","",$str); //过滤title标签
    $str=preg_replace("/<(/?title.*?)>/si","",$str); //过滤title标签
    $str=preg_replace("/<(object.*?)>(.*?)<(/object.*?)>/si","",$str); //过滤object标签
    $str=preg_replace("/<(/?objec.*?)>/si","",$str); //过滤object标签
    $str=preg_replace("/<(noframes.*?)>(.*?)<(/noframes.*?)>/si","",$str); //过滤noframes标签
    $str=preg_replace("/<(/?noframes.*?)>/si","",$str); //过滤noframes标签
    $str=preg_replace("/<(i?frame.*?)>(.*?)<(/i?frame.*?)>/si","",$str); //过滤frame标签
    $str=preg_replace("/<(/?i?frame.*?)>/si","",$str); //过滤frame标签
    $str=preg_replace("/<(script.*?)>(.*?)<(/script.*?)>/si","",$str); //过滤script标签
    $str=preg_replace("/<(/?script.*?)>/si","",$str); //过滤script标签
    $str=preg_replace("/javascript/si","Javascript",$str); //过滤script标签
    $str=preg_replace("/vbscript/si","Vbscript",$str); //过滤script标签
    $str=preg_replace("/on([a-z]+)s*=/si","On\1=",$str); //过滤script标签
    $str=preg_replace("/&#/si","&#",$str); //过滤script标签,

    $str = preg_replace( "@<script(.*?)</script>@is", "", $str ); //过滤script代码
    $str = preg_replace( "@<iframe(.*?)</iframe>@is", "", $str );
    $str = preg_replace( "@<style(.*?)</style>@is", "", $str );
    $str = preg_replace( "@<(.*?)>@is", "", $str ); 
    ?>

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  • 原文地址:https://www.cnblogs.com/wayne173/p/4255390.html
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