Where to check if an User is logged in in a Laravel Application?

I've been using your advice and View::sharing all of my important data to all views. However, there is one issue I have encountered.

This code:

if(!Auth::guest()){
            $user=Auth::user()->id;
        }
        else $user=0;
        $temp=DB::select('query');


        View::share('cartnumber', count($temp));
        View::share('cartitems', $temp);

doesn't work when put in AppServiceProvider. Or better, it always sets $user=0, even if I am logged in. I thought it is because AppServiceProvider's boot function executes before the site checks if someone is logged in.

I then tried to use a BaseController with a construct function but that doesn't work either. The only solution that seems to work correctly is putting the code in every single Controller for every view! That actually works, which kind of confirms my theory.

But is there anywhere I can put this code without having to copy/paste it in every single Controller? Thanks in advance!

via Chebli Mohamed