include_once changed behavior?

Hi, In order to keep configuration files outside the web root I use: include_once('../config.php'); This used to work also when running php scripts from the command line. Now I have a new server and I get "no such file or directory" when using this construct from the command line. I have worked around this by doing this: $main_folder = realpath(dirname($_SERVER['SCRIPT_FILENAME']).'/..'); include_once($main_folder . '/config.php'); The original, simpler construct still works when calling the page from a web browser, just not when I run it from the command line. The new server has a more recent version of PHP (4.3.4). I don't have the php version of the old server but it was on RedHat 9 - now I'm on Mandrake 10. What could be the difference that caused this? /Mattias