php过滤HTML标签、属性等正则表达式汇总

$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( 

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);
}