Is it possible to pass a route parameter to controller constructor in Laravel?

Question

Is it possible to inject a route-paramter (or an route segment) to the controller-constructor?

You find some code to clarify my question.

class TestController{

    protected $_param;

    public function __construct($paramFromRoute)
    {
        $this->param = $paramFromRoute;
    }

    public function testAction()
    {
        return "Hello ".$this->_param;
    }
}

----------------------------------------------------

App::bind('TestController', function($app, $paramFromRoute){
    $controller = new TestController($paramFromRoute);
    return $controller;
});

----------------------------------------------------

// here should be some magic
Route::get('foo/{bar}', 'TestController'); 

Answer 1

It's not possible to inject them, but you have access to all of them via:

class TestController{

    protected $_param;

    public function __construct()
    {
        $id = Route::current()->getParameter('id');
    }

}

Answer 2

Laravel 5.3.28

You can't inject the parameter... But, you can inject the request and get it from the router instance, like this:

//route: url_to_controller/{param}
public function __construct(Request $request)
{
   $this->param = $request->route()->parameter('param');
}