Warning: include_once(config.php): Failed to open stream: No such file or directory in C:\xampp\htdocs\all\fail\Database.php on line 3

Warning: include_once(): Failed opening 'config.php' for inclusion (include_path='C:\xampp\php\PEAR') in C:\xampp\htdocs\all\fail\Database.php on line 3

Fatal error: Uncaught Error: Undefined constant "DB_HOST" in C:\xampp\htdocs\all\fail\Database.php:21 Stack trace: #0 C:\xampp\htdocs\all\fail\Fault.php(14): Database->__construct() #1 C:\xampp\htdocs\all\fail\faults.php(11): Fault->__construct() #2 {main} thrown in C:\xampp\htdocs\all\fail\Database.php on line 21