php常用正则过滤字符串代码

过滤多余回车

$str=preg_replace("/s+/", " ", $str);

注释

$str=preg_replace("/<!--.*?-->/si","",$str);

过滤DOCTYPE

$str=preg_replace("/<(!.*?)>/si","",$str);

过滤html标签

$str=preg_replace("/<(/?html.*?)>/si","",$str);

过滤head标签

$str=preg_replace("/<(/?head.*?)>/si","",$str);

过滤meta标签

$str=preg_replace("/<(/?meta.*?)>/si","",$str);

过滤body标签

$str=preg_replace("/<(/?body.*?)>/si","",$str);

过滤link标签

$str=preg_replace("/<(/?link.*?)>/si","",$str);

过滤form标签

$str=preg_replace("/<(/?form.*?)>/si","",$str);

过滤COOKIE标签

$str=preg_replace("/cookie/si","COOKIE",$str);

过滤applet标签

$str=preg_replace("/<(applet.*?)>(.*?)<(/applet.*?)>/si","",$str);

过滤applet标签

$str=preg_replace("/<(/?applet.*?)>/si","",$str);

过滤style标签

$str=preg_replace("/<(style.*?)>(.*?)<(/style.*?)>/si","",$str);

过滤style标签

$str=preg_replace("/<(/?style.*?)>/si","",$str);

过滤title标签

$str=preg_replace("/<(title.*?)>(.*?)<(/title.*?)>/si","",$str);

过滤title标签

$str=preg_replace("/<(/?title.*?)>/si","",$str);

过滤object标签

$str=preg_replace("/<(object.*?)>(.*?)<(/object.*?)>/si","",$str);

过滤object标签

$str=preg_replace("/<(/?objec.*?)>/si","",$str);

过滤noframes标签

$str=preg_replace("/<(noframes.*?)>(.*?)<(/noframes.*?)>/si","",$str);

过滤noframes标签

$str=preg_replace("/<(/?noframes.*?)>/si","",$str);

过滤frame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script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);