PHP清除html格式的代码

$descclear = str_replace("
","",$descclear);//过滤换行
$descclear = str_replace("
","",$descclear);//过滤换行
$descclear = str_replace("	","",$descclear);//过滤换行
$descclear = str_replace("
","",$descclear);//过滤换行
$descclear = preg_replace("/s+/", " ", $descclear);//过滤多余回车
$descclear = preg_replace("/<[ ]+/si","<",$descclear); //过滤<__("<"号后面带空格)
$descclear = preg_replace("/<!--.*?-->/si","",$descclear); //过滤html注释
$descclear = preg_replace("/<(!.*?)>/si","",$descclear); //过滤DOCTYPE
$descclear = preg_replace("/<(/?html.*?)>/si","",$descclear); //过滤html标签
$descclear = preg_replace("/<(/?head.*?)>/si","",$descclear); //过滤head标签
$descclear = preg_replace("/<(/?meta.*?)>/si","",$descclear); //过滤meta标签
$descclear = preg_replace("/<(/?body.*?)>/si","",$descclear); //过滤body标签
$descclear = preg_replace("/<(/?link.*?)>/si","",$descclear); //过滤link标签
$descclear = preg_replace("/<(/?form.*?)>/si","",$descclear); //过滤form标签
$descclear = preg_replace("/cookie/si","COOKIE",$descclear); //过滤COOKIE标签
$descclear = preg_replace("/<(applet.*?)>(.*?)<(/applet.*?)>/si","",$descclear); //过滤applet标签
$descclear = preg_replace("/<(/?applet.*?)>/si","",$descclear); //过滤applet标签
$descclear = preg_replace("/<(style.*?)>(.*?)<(/style.*?)>/si","",$descclear); //过滤style标签
$descclear = preg_replace("/<(/?style.*?)>/si","",$descclear); //过滤style标签
$descclear = preg_replace("/<(title.*?)>(.*?)<(/title.*?)>/si","",$descclear); //过滤title标签
$descclear = preg_replace("/<(/?title.*?)>/si","",$descclear); //过滤title标签
$descclear = preg_replace("/<(object.*?)>(.*?)<(/object.*?)>/si","",$descclear); //过滤object标签
$descclear = preg_replace("/<(/?objec.*?)>/si","",$descclear); //过滤object标签
$descclear = preg_replace("/<(noframes.*?)>(.*?)<(/noframes.*?)>/si","",$descclear); //过滤noframes标签
$descclear = preg_replace("/<(/?noframes.*?)>/si","",$descclear); //过滤noframes标签
$descclear = preg_replace("/<(i?frame.*?)>(.*?)<(/i?frame.*?)>/si","",$descclear); //过滤frame标签
$descclear = preg_replace("/<(/?i?frame.*?)>/si","",$descclear); //过滤frame标签
$descclear = preg_replace("/<(script.*?)>(.*?)<(/script.*?)>/si","",$descclear); //过滤script标签
$descclear = preg_replace("/<(/?script.*?)>/si","",$descclear); //过滤script标签
$descclear = preg_replace("/javascript/si","Javascript",$descclear); //过滤script标签
$descclear = preg_replace("/vbscript/si","Vbscript",$descclear); //过滤script标签
$descclear = preg_replace("/on([a-z]+)s*=/si","On\1=",$descclear); //过滤script标签
$descclear = preg_replace("/&#/si","&＃",$descclear); //过滤script标签，如javAsCript:alert();
//使用正则替换
$pat = "/<(/?)(script|i?frame|style|html|body|li|i|map|title|img|link|span|u|font|table|tr|b|marquee|td|strong|div|a|meta|?|%)([^>]*?)>/isU";
$descclear = preg_replace($pat,"",$descclear);