Non www to www php redirection for IIS6

php redirection for IIS6

<?php
/* Non www to www php redirection for IIS6 */
if (!strpos('|||' . $_SERVER['HTTP_HOST'],"www") && !isset($_REQUEST['rd'])) {
 $redirect = "http://www.oguzhanbasar.com";
 if (isset($_SERVER['REQUEST_URI']) && strlen($_SERVER['REQUEST_URI'])>0) {
   $redirect .= $_SERVER['REQUEST_URI'];
 }
 if (strpos($redirect,"?")) {
    //$redirect .= "&rd=1";
 } else {
    //$redirect .= "?rd=1";           
 }
 header("HTTP/1.1 301 Moved Permanently"); 
 header("Location: " . $redirect);
}
?>