Warning: Use of undefined constant PHP_SELF - assumed 'PHP_SELF' (this will throw an Error in a future version of PHP) in /index.php on line 9

Warning: require_once(//includes/defines.php): failed to open stream: No such file or directory in /index.php on line 20

Fatal error: require_once(): Failed opening required '//includes/defines.php' (include_path='.:/:/usr/local/php74/lib/pear') in /index.php on line 20