note 33203 added to function.main

I got the following error message after upgrading to PHP 4. Please help. Warning: main(extention.inc) [function.main]: failed to create stream: No such file or directory in /usr2/hsphere/home/..../admin/myphpnuke/myphpnuke.php on line 3 Warning: main() [function.main]: Failed opening 'extention.inc' for inclusion (include_path='.:/usr/local/lib/php') in /usr2/hsphere/home/..../admin/myphpnuke/myphpnuke.php on line 3 Fatal error: Call to undefined function: gethelpfile() in /usr2/hsphere/home/..../admin/myphpnuke/myphpnuke.php on line 5 ---- Manual Page -- http://www.php.net/manual/en/function.main.php Edit Note -- http://master.php.net/manage/user-notes.php?action=edit+33203 Delete Note -- http://master.php.net/manage/user-notes.php?action=delete+33203&report=yes Reject Note -- http://master.php.net/manage/user-notes.php?action=reject+33203&report=yes