POC for stackoverflow.com/questions/60169581

index.php

<?php

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

require './vendor/autoload.php';

class TypeHintTestController {
    private $container;

    public function __construct(ContainerInterface $container) {
        $this->container = $container;
    }

    public function index(Request $request, Response $response, array $args) {
        $response->getBody()->write("From: " . get_class($this->container));
        return $response;
    }
}

$app = new \Slim\App;
$app->get('/', '\TypeHintTestController:index');
$app->run();

it works, thank you‼