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I'm using Slim, and php-di for the container, I've been trying to figure out how to autowire the dependencies without success.

I have App\Models\Planner.php that I'd like to inject into App\Controllers\MealPlanner.php, along with various other classes and models that are called by different endpoints/methods/actions.

Right now on Services.php, I'm creating 4 services 2 which will get passed to other classes, and 2 factories which are the Planner.php and MealPlanner.php which is called in the router on index.php.

Now that MealPlanner is defined as a service, it can be called directly i.e from $app->any('/mealplanner/{action}', \MealPlanner::class);, if I remove the $app->set('MealPlanner', ...) I'll get "Callable MealPlanner does not exist", why is it callable there without accessing the container?

Secondly, let's say I'd like to inject Fruits class onto MealPlanner along with the Planner.php, to do that I'd have to add a new service $container->set("Fruits", (){ return App\Models\Fruits.php(PDO $db, $UserId) }) then on MealPlanner service I'd have to pass the fruits container there, and then on MealPlanner controller it'd now be: