getting data on server with globals off.

I just have a quick question.

I am programming something for a server with register globals off.

If I start a session and register some data, on pages after that, is there a special way to call say $mydata?

or is $mydata ok. I know on get and post you need to precede $mydata with get or post.

Thanks

$SESSION['mydata']
$COOKIE['variable']
$FILES['variable']
$GET['variable']
$POST['variable']
$SERVER['variable']

Thanks guys.

I learned the old school way and am re-learning some techniques. Time to read up on the latest.