Use HttpFoundation

index.php

@@ -1,5 +1,14 @@
 <?php
-$name = $_GET['name'] ?? 'poopstink';
+require_once __DIR__.'/vendor/autoload.php';
 
-printf('Hello %s', $name);
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+$request = Request::createFromGlobals();
+
+$name = $request->query->get('name', 'Dingo');
+
+$response = new Response(sprintf('Hello %s', htmlspecialchars($name, ENT_QUOTES, 'UTF-8')));
+
+$response->send();