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<div class="codetitle"><a style="CURSOR: pointer" data="53425" class="copybut" id="copybut53425" onclick="doCopy('code53425')"> 代码如下:<div class="codebody" id="code53425">
$str=preg_replace("/s+/"," ",$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
$str=preg_replace("/<(/?head.?)>/si",$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
$str=preg_replace("/on([a-z]+)s*=/si","On1=",$str); //过滤script标签
$str=preg_replace("/&#/si","&＃",$str); //过滤script标签，如javAsCript:alert(
（编辑：李大同）
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