class Kernel extends SymfonyKernel implements EventSubscriberInterface { use MicroKernelTrait; public function bowtiesAction(): Response { return new RedirectResponse('I wear a fez now. Fezzes are cool!'); } public function dangerousAction(): Response { throw new Danger('🔥🔥 😈🐷 🔱🔺 🔥🔥'); } public function onKernelException(ExceptionEvent $event): void { if ($event->getThrowable() instanceof Danger) { $event->setResponse(new Response("👴🏻: It's dangerous to go alone. Take this: 🗡️")); } } protected function configureRoutes(RoutingConfigurator $routes): void { $routes->add('bowties', '/bowties')->controller('kernel::bowtiesAction'); $routes->add('danger', '/danger')->controller('kernel::dangerousAction'); } public static function getSubscribedEvents(): array { return [KernelEvents::EXCEPTION => 'onKernelException']; } }