[SOLVED]Web and mobile via same backend

Sorry you misunderstood, the backend is in this case not an administration panel of some sorts, but more like a server, a daemon. The user can't access it, it will not load any views. It gets a command from the mobile app or website, and returns a value. Not any more then that.

I just have it so the mobile app won't directly access the database, and I don't have to write the same database code twice (for web and app).

The backend is more like the API you described I guess.