Don't understand HTTP_SESSION_VARS

Ok, I'm not really getting this. Without anything in my php.ini I was able to register session vars just like session_register('var') and then access them using $GLOBALS['var']. From what I'm gathering there's a performance hit from using the $GLOBALS? So I turned register_globals off, I'm registering my session vars the same way (i.e. session_register('var')) and then I try to access them with $HTTP_SESSION_VARS['var'], but I don't see my variables. I also defined $HTTP_SESSION_VARS as a global at the top of my function. Does anyone know exactly how this works or can point me to a reference page that has how this works? Thanks in advance for any replies. -- Michael Champagne, Software Engineer Capital Institutional Services, Inc. wk: mchampagne@capis.com hm: mchamp@texas.net ****************************************************************** This communication is for informational purposes only. It is not intended as an offer or solicitation for the purchase or sale of any financial instrument or as an official confirmation of any transaction, unless specifically agreed otherwise. All market prices, data and other information are not warranted as to completeness or accuracy and are subject to change without notice. Any comments or statements made herein do not necessarily reflect the views or opinions of Capital Institutional Services, Inc. Capital Institutional Services, Inc. accepts no liability for any errors or omissions arising as a result of transmission. Use of this communication by other than intended recipients is prohibited. ******************************************************************