代码如下

<?php   
 $the_host = $_SERVER[HTTP_HOST];
 $request_uri = isset($_SERVER[REQUEST_URI]) ? $_SERVER[REQUEST_URI] : ;
 if($the_host !== www.landui.com)
 {
     //echo $_SERVER[HTTP_HOST].$_SERVER[PHP_SELF];
    header(HTTP/1.1 301 Moved Permanently);
    header(Location: http://www.landui.com . $_SERVER[PHP_SELF]  . $request_uri);
 }
?>