its instanceof it seems

Author: lsmith77

Controller/ExceptionController.php

@@ -64,7 +64,7 @@ public function showAction(Request $request, $exception, DebugLoggerInterface $l
          *
          * @see https://github.com/FriendsOfSymfony/FOSRestBundle/pull/565
          */
-        if (!$exception instanceOf DebugFlattenException && !$exception instanceOf HttpFlattenException) {
+        if (!$exception instanceof DebugFlattenException && !$exception instanceof HttpFlattenException) {
             throw new \InvalidArgumentException(sprintf(
                 'ExceptionController::showAction can only accept some exceptions (%s, %s), "%s" given',
                 "Symfony\Component\HttpKernel\Exception\FlattenException",

EventListener/ViewResponseListener.php

@@ -75,7 +75,7 @@ public function onKernelView(GetResponseForControllerResultEvent $event)
         $configuration = $request->attributes->get('_view');
 
         $view = $event->getControllerResult();
-        if (!$view instanceOf View) {
+        if (!$view instanceof View) {
             if (!$configuration && !$this->container->getParameter('fos_rest.view_response_listener.force_view')) {
                 return parent::onKernelView($event);
             }

View/ViewHandler.php

@@ -305,7 +305,7 @@ public function renderTemplate(View $view, $format)
         $data = $this->prepareTemplateParameters($view);
 
         $template = $view->getTemplate();
-        if ($template instanceOf TemplateReference) {
+        if ($template instanceof TemplateReference) {
             if (null === $template->get('format')) {
                 $template->set('format', $format);
             }