Fatal error:  Uncaught Error: Undefined constant "_DIR_" in /home/tripsuwm/public_html/App/Controllers/FlightsController.php:3
Stack trace:
#0 /home/tripsuwm/public_html/index.php(384): require_once()
#1 {main}
  thrown in /home/tripsuwm/public_html/App/Controllers/FlightsController.php on line 3