php处理二级域名以及域名跳转

        PHP处理二级域名已经域名跳转：

<?php

switch ($_SERVER["HTTP_HOST"])

{

case "www.luxiaok.com":
header("location:index.html");
break;

case "www.luxiaok.tk":
header("location:index0.php");
break;

case "sina.luxiaok.tk":
header("location:http://blog.sina.com.cn/ksir");
break;

default:
header("location:index0.php");
break;

}
?>