Use ??= more

Author: nicolas-grekas

Controller/AbstractController.php

@@ -251,10 +251,7 @@ protected function renderView(string $view, array $parameters = []): string
     protected function render(string $view, array $parameters = [], Response $response = null): Response
     {
         $content = $this->renderView($view, $parameters);
-
-        if (null === $response) {
-            $response = new Response();
-        }
+        $response ??= new Response();
 
         if (200 === $response->getStatusCode()) {
             foreach ($parameters as $v) {

Controller/RedirectController.php

@@ -124,9 +124,7 @@ public function urlRedirectAction(Request $request, string $path, bool $permanen
             return new RedirectResponse($path, $statusCode);
         }
 
-        if (null === $scheme) {
-            $scheme = $request->getScheme();
-        }
+        $scheme ??= $request->getScheme();
 
         if ($qs = $request->server->get('QUERY_STRING') ?: $request->getQueryString()) {
             if (!str_contains($path, '?')) {

Test/KernelTestCase.php

@@ -110,9 +110,7 @@ protected static function getContainer(): ContainerInterface
      */
     protected static function createKernel(array $options = []): KernelInterface
     {
-        if (null === static::$class) {
-            static::$class = static::getKernelClass();
-        }
+        static::$class ??= static::getKernelClass();
 
         if (isset($options['environment'])) {
             $env = $options['environment'];