Warning: include(common.php) [function.include]: failed to open stream: No such file or directory in /var/www/forum.php on line 2

Warning: include() [function.include]: Failed opening 'common.php' for inclusion (include_path='.:/usr/share/php:/usr/share/pear') in /var/www/forum.php on line 2

Fatal error: Class 'common' not found in /var/www/forum.php on line 4