basic php?
[COLOR= #0000BB]<?php[/COLOR]
[URL="http://www.php.net/if"]if[/URL] [COLOR= #007700]([/COLOR][COLOR= #0000BB]$get_userdata[/COLOR][COLOR= #007700][[/COLOR][COLOR= #DD0000]rank[/COLOR][COLOR= #007700]] ==[/COLOR][COLOR= #DD0000]"admin"[/COLOR][COLOR= #007700]) {[/COLOR]
[URL="http://www.php.net/echo"]echo[/URL] [COLOR= #DD0000]"Je bent admin!"[/COLOR][COLOR= #007700];
}[/COLOR] 
Als je dat in de admin wilt inbouwen, be my guest.