Sharing the same instance of an object: auryn vs. PHP-DI - php

Question

I am trying to build my first no-framework PHP application and I am following this tutorial.
I am relatively new to some concepts described in the tutorial. Despite this, I decided to use, as Dependency Injector, PHP-DI instead of the suggested one (rdlowrey/auryn).
I have created everything according to the tutorial except for the file Bootstrap.php (and the file Dependencies.php:
<?php declare(strict_types = 1);
require(__DIR__ . '/../vendor/autoload.php');
...
$container = include('Dependencies.php');
$request = $container->make('Http\HttpRequest');
$response = $container->make('Http\HttpResponse');
...
switch ($routeInfo[0]) {
...
case \FastRoute\Dispatcher::FOUND:
$className = $routeInfo[1][0];
$method = $routeInfo[1][1];
$vars = $routeInfo[2];
$class = $container->make($className);
$class->$method($vars); // (**)
break;
}
echo $response->getContent(); // (*)
$class can be only an instance of a Homepage class which has only one method (show()), called in (**):
class Homepage
{
private $request;
private $response;
private $renderer;
public function __construct(
Request $request,
Response $response,
Renderer $renderer
) {
$this->request = $request;
$this->response = $response;
$this->renderer = $renderer;
}
public function show() {
$data = [
'name' => $this->request->getParameter('name', 'stranger'),
];
$html = $this->renderer->render('Homepage', $data);
$this->response->setContent($html); // (***)
}
}
With all that said, the application returns a 200 HTTP response with an empty body [here (*)]
but if I try to print the content of the HTTP response after (***) I get the correct response.
This could mean that there are two different instances of an HttpResponse class. (Is that right?)
By using rdlowrey/auryn, the author of the tutorial, used the method share() to share the same HttpReponse instance among classes, as shown in the "original" Dependencies.php file:
<?php declare(strict_types = 1);
use \Auryn\Injector;
...
$injector = new Injector;
$injector->alias('Http\Response', 'Http\HttpResponse');
$injector->share('Http\HttpResponse');
...
return $injector;
Is there a way to get the same behavior using PHP-DI (with PHP definitions)?
Here's my version of Dependencies.php:
<?php declare(strict_types = 1);
$definitions = [
'Http\Request' => DI\create('Http\HttpRequest')->constructor(
$_GET, $_POST, $_COOKIE, $_FILES, $_SERVER),
'Http\HttpRequest' => function () {
$r = new Http\HttpRequest($_GET, $_POST, $_COOKIE, $_FILES, $_SERVER);
return $r;
},
'Http\Response' => DI\create('Http\HttpResponse'),
'Twig\Environment' => function () {
$loader = new Twig\Loader\FilesystemLoader(
dirname(__DIR__) . '/templates');
$twig = new Twig\Environment($loader);
return $twig;
},
'Example\Template\TwigRenderer' => function (Twig\Environment $renderer) {
return new Example\Template\TwigRenderer($renderer);
},
'Example\Template\Renderer' => DI\create(
'Example\Template\TwigRenderer')->constructor(
DI\get('Twig\Environment')),
];
$containerBuilder = new DI\ContainerBuilder;
$containerBuilder->addDefinitions($definitions);
$container = $containerBuilder->build();
return $container;

Answer 1

In Bootstrap.php, getting (get()) HttpRequest/HttpResponse instances, instead of making (make()) them, solved the problem.
...
$container = include('Dependencies.php');
$request = $container->get('Http\HttpRequest');
$response = $container->get('Http\HttpResponse');
...
As clearly stated in the documentation:
The make() method works like get() except it will resolve the entry
every time it is called. [..] if the entry is an object, an new instance will be created every time [..]