[James Birkett]

Is there a method of making the only means of accessing the admincp and modcp directories via a referrer from that direct URL?

PHP Code:

if($_SERVER['HTTP_REFERER'] != "http://www.example.com/*"){
header("location: http://www.example.com/");
} 


Is this method reliable? Do vBulletin send referring headers by default? and can you use wildcards (like I did above)?