start.php

<?php

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

session_cache_limiter(false);
session_start();

ini_set('display_errors', 'On');

define('INC_ROOT', dirname(__DIR__));

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

$app = AppFactory::create();

$app->get('/test', function (Request $request, Response $response) {

    echo 'This is a test route.';

});