一、PHP过滤各种单独标签  

$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

$str=preg_replace("/on([a-z]+)\s*=/si","On\\1=",$str); //过滤script标签

$str=preg_replace("/&#/si","&＃",$str); //过滤script标签，如javAsCript:alert(

清除空格，换行

function DeleteHtml($str)

{

$str = trim($str);

$str = strip_tags($str,"");

$str = ereg_replace("\t","",$str);

$str = ereg_replace("\r\n","",$str);

$str = ereg_replace("\r","",$str);

$str = ereg_replace("\n","",$str);

$str = ereg_replace(" "," ",$str);

return trim($str);

}

二、PHP过滤全部HTML标签属性

过滤所有html标签的正则表达式：

</?[^>]+>

//过滤所有html标签的属性的正则表达式：

$html = preg_replace("/<([a-zA-Z]+)[^>]*>/","<\\1>",$html);

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