example.php

<?php

$container = new League\Container\Container;

$container->add('Zend\Diactoros\ServerRequest', function () {
   return Zend\Diactoros\ServerRequestFactory::fromGlobals(
       $_SERVER,
        $_GET,
        $_POST,
        $_COOKIE,
        $_FILES
    );
});

$container->add('Zend\Diactoros\Response');

// add your controllers to the container

$router = new League\Route\RouteCollection($container);

$router->map('GET', '/example', 'Some\Controller::action') // also still have convenience http methods (get, post, put etc)
       ->setName('example')          // optional
       ->setScheme('http')           // optional
       ->setHost('sub.example.com'); // optional
       
$router->group('/prefix', function ($router) {
    // route below will match on GET /prefix/example
    $router->map('GET', '/example', 'Some\Controller::action') // also still have convenience http methods (get, post, put etc)
       ->setName('example')          // optional
       ->setScheme('http')           // optional (will override the group conditions added below)
       ->setHost('sub.example.com'); // optional (will override the group conditions added below)
})
->setScheme('http')           // optional
->setHost('sub.example.com'); // optional;
       
$response = $router->dispatch(
    $container->get('Zend\Diactoros\ServerRequest'),
    $container->get('Zend\Diactoros\Response')
);

(new Zend\Diactoros\Response\SapiEmitter)->emit($response);