Index usando HttpFoundation

index.php

<?php

// framework/index.php
require_once __DIR__.'/vendor/autoload.php';

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

$request = Request::createFromGlobals();

$input = $request->get('name', 'World');

$response = new Response(
  sprintf('Hello %s', htmlspecialchars($input, ENT_QUOTES, 'UTF-8'))
);

$response->send();