/**
* Force a redirect to a domain starting with "www."
*/
public static function forceWWW()
{
if (!Director::isDev() && !Director::isTest() && strpos($_SERVER['HTTP_HOST'], 'www') !== 0) {
$destURL = str_replace(Director::protocol(), Director::protocol() . 'www.', Director::absoluteURL($_SERVER['REQUEST_URI']));
self::force_redirect($destURL);
}
}