Fatal error: Uncaught Error: Undefined constant "DB_HOST" in /var/www/sisviu/core/model.php:9 Stack trace: #0 /var/www/sisviu/controllers/notfoundController.php(10): Model->__construct() #1 /var/www/sisviu/core/Core.php(155): notfoundController->__construct() #2 /var/www/sisviu/core/Core.php(11): Core->run() #3 /var/www/sisviu/index.php(29): Core->__construct() #4 {main} thrown in /var/www/sisviu/core/model.php on line 9