Get Dependency Injection in a class with Slim 3 - php

Question

I have a problem with DI, it's new for me. I would like to give the Container as DI in my Project class, but i got an error :
Argument 1 passed to Project::__construct() must be an instance of Slim\Container, none given
I created a class Project :
use Slim\Container;
class Project {
protected $ci;
public function __construct(Container $ci) {
$this->ci = $ci;
}
}
Here my DIC configuration :
//dependencies.php
$container = $app->getContainer();
$container[Project::class] = function ($c) {
return new Project($c);
};
And here my code index.php to run the code
// Instantiate the app
$settings = require __DIR__ . '/../app/configs/settings.php';
$app = new \Slim\App($settings);
// Set up dependencies
require __DIR__ . '/../app/configs/dependencies.php';
// Register middleware
require __DIR__ . '/../app/configs/middleware.php';
// Register routes
require __DIR__ . '/../app/configs/routes.php';
require __DIR__ . '/../app/model/Project.php';
$app->get('/project/{id}', function (Request $request, Response $response) {
$project = new Project();
return $response;
});
$app->run();
I dont know where i failed, i even tried to use slim-brige, but i got the same result. I also tried to give a string instead of the the Container, and i still get null

Answer 1

Argument 1 passed to Project::__construct() must be an instance of Slim\Container, none given
Well, no argument given to the constructor indeed:
$app->get('/project/{id}', function (Request $request, Response $response) {
$project = new Project(); // You should pass container instance here, but you don't
return $response;
});
Since you have registered your Project class in the container, you can get instance from the container:
$app->get('/project/{id}', function (Request $request, Response $response) {
$project = $this->container->get('Project'); // Get Project instance from the container, you have already registered it
return $response;
});