Access app in class in Slim Framework 3

Question

Im having trouble understanding how to access the instance of Slim when a route is in a seperate class than index.php

When using Slim Framework 2 I always used the follo

Answer 1

Have a look at the Slim 3 Skeleton created by Rob Allen.

Slim 3 heavily uses dependency injection, so you might want to use it too.

In your dependencies.php add something like:

$container = $app->getContainer();

$container['rdb'] = function ($c) {
    return $conn;
};

$container['Your\Custom\Class'] = function ($c) {
    return new \Your\Custom\Class($c['rdb']);
};

And in your Your\Custom\Class.php:

class Class {
    private $rdb;
    function __construct($rdb) {
        $this->rdb = $rdb;
    }

    public function test($request, $response, $args) {
        $this->rdb->doSomething();
    }
}

I hope this helps, if you have any more questions feel free to ask.

Update:

When you define your route like this

$app->get('/test', '\mycontroller:test');

Slim looks up \mycontroller:test in your container:

$container['\mycontroller'] = function($c) {
    return new \mycontroller($c['rdb']);
}

So when you open www.example.com/test in your browser, Slim automatically creates a new instance of \mycontroller and executes the method test with the arguments $request, $response and $args. And because you accept the database connection as an argument for the constructor of your mycontroller class, you can use it in the method as well :)