no.... Register globals to my knowledge isn't that. I don't have a full explanation. But the $_SERVER varitable is one built into PHP (Not Register Globals) and contains it's own server side functions. If you have Macromedia Dreamweaver handy you can see all the dif types of things you can call with $_SERVER... You Can't Access a get varitable/array from the server varitable/array (and vice versa)
You may wish to take a look at the good ole php.net (The complete ediots [and advanced users] guide.) Specificially this
http://us2.php.net/manual/en/languag...predefined.php