public function homepage(App $app) { $app['session']->getFlashBag()->add('warning', 'Warning flash message'); $app['session']->getFlashBag()->add('info', 'Info flash message'); $app['session']->getFlashBag()->add('success', 'Success flash message'); $app['session']->getFlashBag()->add('danger', 'Danger flash message'); return $app['twig']->render('index.html.twig'); }