function DeleteHtml($str)
{
/*$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('aabb)*/
//清除空格和换行
$str = trim($str); //清除字符串两边的空格
$str = strip_tags($str,""); //利用php自带的函数清除html格式
$str = preg_replace("/ /","",$str); //使用正则表达式替换内容,如:空格,换行,并将替换为空。
$str = preg_replace("/
/","",$str);
$str = preg_replace("/
/","",$str);
$str = preg_replace("/
/","",$str);
$str = preg_replace("/ /","",$str);
$str = preg_replace("/ /","",$str); //匹配html中的空格
$str = preg_replace("/(s*?r?ns*?)+/","n",$str); //去除字符串内部的空行:
$str = preg_replace('/($s*$)|(^s*^)/m', '',$str); //去除全部的空行,包括内部和头尾
return trim($str);
}
转自:http://www.shuchengxian.com/article/691.html