<?php
require_once __DIR__ . '/../vendor/autoload.php';

$config = new \DrMVC\Config();
$config->load(__DIR__ . '/../app/database.php', 'database');

use \Psr\Http\Message\ServerRequestInterface as Request;
use \Psr\Http\Message\ResponseInterface as Response;

$app = new \DrMVC\App($config);
$app
    ->get('/', \MyApp\Controllers\Index::class . ':default') //-> public function action_default()
    ->get('/zzz', \MyApp\Controllers\Index::class) //-> public function action_index()
    ->get('/zzz/<action>', \MyApp\Controllers\Index::class)
    ->get('/aaa', function(Request $request, Response $response, $args) {
        print_r($args);
    });

echo $app->run();

<?php

namespace MyApp\Controllers;

use \Psr\Http\Message\ServerRequestInterface as Request;
use \Psr\Http\Message\ResponseInterface as Response;

class Index
{
    public function action_index(Request $request, Response $response, $args)
    {
        $out = [
            'dummy',
            'array'
        ];

        $json = json_encode($out);
        header('Content-Type: application/json');
        $response->getBody()->write($json);
    }

    public function action_defaultRequest $request, Response $response, $args)
    {
        $out = [
            'test1',
            'test2'
        ];

        $json = json_encode($out);
        header('Content-Type: application/json');
        $response->getBody()->write($json);
    }
}