Mezzio (PSR-15 Middleware)

Mezzio — PSR-15 Middleware Stack

composer create-project mezzio/mezzio-skeleton myapp

// config/pipeline.php
$app->pipe(ErrorHandler::class);
$app->pipe(ServerUrlMiddleware::class);
$app->pipe(RouteMiddleware::class);
$app->pipe(ImplicitHeadMiddleware::class);
$app->pipe(AuthenticationMiddleware::class);
$app->pipe(DispatchMiddleware::class);
$app->pipe(NotFoundHandler::class);

// Handler (controller replacement)
class PostHandler implements RequestHandlerInterface {
    public function handle(ServerRequestInterface $request): ResponseInterface {
        $posts = $this->postTable->fetchAll();
        return new JsonResponse(["posts" => $posts]);
    }
}

// Route configuration
return function(Application $app, MiddlewareFactory $factory, ContainerInterface $container): void {
    $app->get("/api/posts",      PostHandler::class,     "api.posts");
    $app->post("/api/posts",     CreatePostHandler::class);
    $app->get("/api/posts/{id}", PostDetailHandler::class);
};