Where is my REMOTE_USER?

Hi, when logging in with username and password with the good old "Require user" mechanism in Apache I could earlier see the name of the user logging in as $REMOTE_USER. But it seems now to have disappeared. It seems to be nowhere, neither as $GLOBALS['REMOTE_USER'] $_SERVER['REMOTE_USER'] $_ENV['REMOTE_USER'] or in the older $HTTP_SERVER_VARS['REMOTE_USER'] or in any of the other superglobals. Did it possibly fall out of the PHP implementation? Or should it be there and I am overlooking something? Thanks! Frank U5.com