Introducing Mini Mezzio : even quicker Mezzio applications! (believe it or not...)

I've always wanted setting up a Mezzio (formerly Zend Expressive) project to be even easier. For example, at the time of writing, Slim PHP homepage has what I think is an extremely simple usage code block:

use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use Slim\Factory\AppFactory;

require __DIR__ . '/../vendor/autoload.php';

$app = AppFactory::create();

$app->get('/hello/{name}', function (Request $request, Response $response, array $args) {
    $name = $args['name'];
    $response->getBody()->write("Hello, $name");
    return $response;


Whilst the Mezzio application setup process is actually very simple, it requires using the Mezzio Skeleton application, which encourages the best practices for a future-proofed setup.

There are times when I want to just spin something up even quicker, even something as simple as the Slim example above. At first, I created a PR to create a "minimal" application factory in mezzio/mezzio#43. However, many suggested this would be better as a separate component. Therefore, I present to you, Mini Mezzio:

$ composer require asgrim/mini-mezzio laminas/laminas-servicemanager mezzio/mezzio-fastroute

Then in public/index.php:



use Laminas\Diactoros\Response\TextResponse;
use Laminas\ServiceManager\ServiceManager;
use Asgrim\MiniMezzio\AppFactory;
use Mezzio\Router\FastRouteRouter;
use Mezzio\Router\Middleware\DispatchMiddleware;
use Mezzio\Router\Middleware\RouteMiddleware;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\RequestHandlerInterface;

require __DIR__ . '/../vendor/autoload.php';

$container = new ServiceManager();
$router = new FastRouteRouter();
$app = AppFactory::create($container, $router);
$app->pipe(new RouteMiddleware($router));
$app->pipe(new DispatchMiddleware());
$app->get('/hello-world', new class implements RequestHandlerInterface {
    public function handle(ServerRequestInterface $request): ResponseInterface
        return new TextResponse('Hello world!');

This example I feel is almost as slimline as the Slim example; it allows you to assume a bunch of defaults, except for the choice of Router and PSR-11 Container.

If this is something that interests you, please check out the repository, which includes more documentation, and let me know how you get on: