Update Create Framework tutorial

Author: alamirault

create_framework/dependency_injection.rst

@@ -10,7 +10,6 @@ to it::
     namespace Simplex;
 
     use Symfony\Component\EventDispatcher\EventDispatcher;
-    use Symfony\Component\HttpFoundation;
     use Symfony\Component\HttpFoundation\RequestStack;
     use Symfony\Component\HttpKernel;
     use Symfony\Component\Routing;
@@ -199,6 +198,7 @@ Now, here is how you can register a custom listener in the front controller::
 
     // ...
     use Simplex\StringResponseListener;
+    use Symfony\Component\DependencyInjection\Reference;
 
     $container->register('listener.string_response', StringResponseListener::class);
     $container->getDefinition('dispatcher')

create_framework/event_dispatcher.rst

@@ -121,7 +121,7 @@ the registration of a listener for the ``response`` event::
         $response = $event->getResponse();
 
         if ($response->isRedirection()
-            || ($response->headers->has('Content-Type') && false === strpos($response->headers->get('Content-Type'), 'html'))
+            || ($response->headers->has('Content-Type') && !str_contains($response->headers->get('Content-Type'), 'html'))
             || 'html' !== $event->getRequest()->getRequestFormat()
         ) {
             return;
@@ -200,7 +200,7 @@ Let's refactor the code a bit by moving the Google listener to its own class::
             $response = $event->getResponse();
 
             if ($response->isRedirection()
-                || ($response->headers->has('Content-Type') && false === strpos($response->headers->get('Content-Type'), 'html'))
+                || ($response->headers->has('Content-Type') && !str_contains($response->headers->get('Content-Type'), 'html'))
                 || 'html' !== $event->getRequest()->getRequestFormat()
             ) {
                 return;

create_framework/http_foundation.rst

@@ -189,7 +189,7 @@ fingertips thanks to a nice and simple API::
     // retrieves a COOKIE value
     $request->cookies->get('PHPSESSID');
 
-    // retrieves a HTTP request header, with normalized, lowercase keys
+    // retrieves an HTTP request header, with normalized, lowercase keys
     $request->headers->get('host');
     $request->headers->get('content-type');
 

create_framework/http_kernel_controller_resolver.rst

@@ -165,15 +165,6 @@ Let's conclude with the new version of our framework::
     use Symfony\Component\HttpKernel;
     use Symfony\Component\Routing;
 
-    function render_template(Request $request): Response
-    {
-        extract($request->attributes->all(), EXTR_SKIP);
-        ob_start();
-        include sprintf(__DIR__.'/../src/pages/%s.php', $_route);
-
-        return new Response(ob_get_clean());
-    }
-
     $request = Request::createFromGlobals();
     $routes = include __DIR__.'/../src/app.php';
 

create_framework/http_kernel_httpkernel_class.rst

@@ -39,7 +39,6 @@ And the new front controller::
     use Symfony\Component\EventDispatcher\EventDispatcher;
     use Symfony\Component\HttpFoundation\Request;
     use Symfony\Component\HttpFoundation\RequestStack;
-    use Symfony\Component\HttpFoundation\Response;
     use Symfony\Component\HttpKernel;
     use Symfony\Component\Routing;