Fix for PHP 8.4

src/Application.php

@@ -52,7 +52,7 @@ public function __construct(
         EmitterInterface $emitter,
         MiddlewarePipelineInterface $pipeline,
         MiddlewareResolverInterface $resolver,
-        RequestHandlerInterface $default = null
+        ?RequestHandlerInterface $default = null
     ) {
         $this->router = $router;
         $this->emitter = $emitter;

src/Exception/BadRequestHttpException.php

@@ -13,7 +13,7 @@ class BadRequestHttpException extends HttpException
      * @param string|null $reasonPhrase
      * @param Throwable|null $previous
      */
-    public function __construct(string $reasonPhrase = null, Throwable $previous = null)
+    public function __construct(?string $reasonPhrase = null, ?Throwable $previous = null)
     {
         parent::__construct(ErrorResponseGeneratorInterface::STATUS_BAD_REQUEST, $reasonPhrase, $previous);
     }

src/Exception/ForbiddenHttpException.php

@@ -13,7 +13,7 @@ class ForbiddenHttpException extends HttpException
      * @param string|null $reasonPhrase
      * @param Throwable|null $previous
      */
-    public function __construct(string $reasonPhrase = null, Throwable $previous = null)
+    public function __construct(?string $reasonPhrase = null, ?Throwable $previous = null)
     {
         parent::__construct(ErrorResponseGeneratorInterface::STATUS_FORBIDDEN, $reasonPhrase, $previous);
     }

src/Exception/HttpException.php

@@ -25,7 +25,7 @@ class HttpException extends Exception
      * @param string|null $reasonPhrase
      * @param Throwable|null $previous
      */
-    public function __construct(int $statusCode, string $reasonPhrase = null, Throwable $previous = null)
+    public function __construct(int $statusCode, ?string $reasonPhrase = null, ?Throwable $previous = null)
     {
         $reasonPhrase ??= '';
 

src/Exception/InternalServerErrorHttpException.php

@@ -13,7 +13,7 @@ class InternalServerErrorHttpException extends HttpException
      * @param string|null $reasonPhrase
      * @param Throwable|null $previous
      */
-    public function __construct(string $reasonPhrase = null, Throwable $previous = null)
+    public function __construct(?string $reasonPhrase = null, ?Throwable $previous = null)
     {
         parent::__construct(ErrorResponseGeneratorInterface::STATUS_INTERNAL_SERVER_ERROR, $reasonPhrase, $previous);
     }

src/Exception/MethodNotAllowedHttpException.php

@@ -13,7 +13,7 @@ class MethodNotAllowedHttpException extends HttpException
      * @param string|null $reasonPhrase
      * @param Throwable|null $previous
      */
-    public function __construct(string $reasonPhrase = null, Throwable $previous = null)
+    public function __construct(?string $reasonPhrase = null, ?Throwable $previous = null)
     {
         parent::__construct(ErrorResponseGeneratorInterface::STATUS_METHOD_NOT_ALLOWED, $reasonPhrase, $previous);
     }

src/Exception/NotFoundHttpException.php

@@ -13,7 +13,7 @@ class NotFoundHttpException extends HttpException
      * @param string|null $reasonPhrase
      * @param Throwable|null $previous
      */
-    public function __construct(string $reasonPhrase = null, Throwable $previous = null)
+    public function __construct(?string $reasonPhrase = null, ?Throwable $previous = null)
     {
         parent::__construct(ErrorResponseGeneratorInterface::STATUS_NOT_FOUND, $reasonPhrase, $previous);
     }

src/Exception/NotImplementedHttpException.php

@@ -13,7 +13,7 @@ class NotImplementedHttpException extends HttpException
      * @param string|null $reasonPhrase
      * @param Throwable|null $previous
      */
-    public function __construct(string $reasonPhrase = null, Throwable $previous = null)
+    public function __construct(?string $reasonPhrase = null, ?Throwable $previous = null)
     {
         parent::__construct(ErrorResponseGeneratorInterface::STATUS_NOT_IMPLEMENTED, $reasonPhrase, $previous);
     }

src/Exception/UnauthorizedHttpException.php

@@ -13,7 +13,7 @@ class UnauthorizedHttpException extends HttpException
      * @param string|null $reasonPhrase
      * @param Throwable|null $previous
      */
-    public function __construct(string $reasonPhrase = null, Throwable $previous = null)
+    public function __construct(?string $reasonPhrase = null, ?Throwable $previous = null)
     {
         parent::__construct(ErrorResponseGeneratorInterface::STATUS_UNAUTHORIZED, $reasonPhrase, $previous);
     }

src/Response/CustomResponseFactory.php

@@ -31,7 +31,7 @@ final class CustomResponseFactory implements ResponseFactoryInterface
      * @param StreamInterface|string|resource $body
      * @param string $protocol
      */
-    public function __construct(array $headers = null, $body = 'php://temp', string $protocol = '1.1')
+    public function __construct(?array $headers = null, $body = 'php://temp', string $protocol = '1.1')
     {
         $this->headers = $headers ?? ['Content-Type' => 'text/html; charset=UTF-8'];
         $this->body = $body;