<?php
$str=preg_replace('/\x80-\xFF/', '', $str);//删除十六进制字符
$str=preg_replace('/\\x[0-9A-F]{2}/', '', $str);//删除十六进制形式的字符串
$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 );
?>
