variables in url

[aa-true-vicious]

Say I have:
http://www.myserver.com/mypage?var=foo

What do I use to return the variable
For example, if there was a form that sent the variable "var" with the value "foo", I'd use:

<?
$var = $_POST["var"];
echo $var;
?>

And I'd get:
foo

What do I use if I just type in the above address

register_globals is off; and won't be turned on

Thanks

[LordShryku]

Anything in the URL uses the $GET array. So you'd reference it as $GET['var']