Notice: Use of undefined constant DIR_SYSTEM - assumed 'DIR_SYSTEM' in C:\XAMPP\htdocs\plr\system\startup.php on line 73

Warning: require_once(DIR_SYSTEMhelper/json.php) [function.require-once]: failed to open stream: No such file or directory in C:\XAMPP\htdocs\plr\system\startup.php on line 73

Fatal error: require_once() [function.require]: Failed opening required 'DIR_SYSTEMhelper/json.php' (include_path='.;c:\xampp\php\PEAR') in C:\XAMPP\htdocs\plr\system\startup.php on line 73