note 17605 added to language.variables.predefined

I have a php document which I direct my server to use as a 404 error doc. In it I write: print "$REQUEST_URI\n"; print "$HTTP_REFERER\n"; The thing is I get the the error page itself in place of $REQUEST_URI and $HTTP_REFERER is blank. any suggestions as to how I can get the URL which the user entered? I'm runnig Apache on RedHat 7.2 -- http://www.php.net/manual/en/language.variables.predefined.php http://master.php.net/manage/user-notes.php?action=edit+17605 http://master.php.net/manage/user-notes.php?action=delete+17605 http://master.php.net/manage/user-notes.php?action=reject+17605