php正则过滤html特殊字符

$str=preg_replace("/\s+/", " ", $str); //过滤多余回车 $str=preg_replace("//si","",$str); //注释 $str=preg_replace("//si","",$str); //过滤DOCTYPE $str=preg_replace("//si","",$str); //过滤html标签 $str=preg_replace("//si","",$str); //过滤br标签 $str=preg_replace("//si","",$str); //过滤head标签 $str=preg_replace("//si","",$str); //过滤meta标签 $str=preg_replace("//si","",$str); //过滤body标签 $str=preg_replace("//si","",$str); //过滤link标签 $str=preg_replace("//si","",$str); //过滤form标签 $str=preg_replace("/cookie/si","COOKIE",$str); //过滤COOKIE标签 $str=preg_replace("/(.*?)/si","",$str); //过滤applet标签 $str=preg_replace("//si","",$str); //过滤applet标签 $str=preg_replace("/(.*?)/si","",$str); //过滤style标签 $str=preg_replace("//si","",$str); //过滤style标签 $str=preg_replace("/(.*?)/si","",$str); //过滤title标签 $str=preg_replace("//si","",$str); //过滤title标签 $str=preg_replace("/(.*?)/si","",$str); //过滤object标签 $str=preg_replace("//si","",$str); //过滤object标签 $str=preg_replace("/(.*?)/si","",$str); //过滤noframes标签 $str=preg_replace("//si","",$str); //过滤noframes标签 $str=preg_replace("/(.*?)/si","",$str); //过滤frame标签 $str=preg_replace("//si","",$str); //过滤frame标签 $str=preg_replace("/(.*?)/si","",$str); //过滤script标签 $str=preg_replace("//si","",$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

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