PHP中过滤常用标签的正则表达式

$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