php正则过滤html标签、空格、换行符

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

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