This is just the admin UI from
genericphpconfig. For security reasons this demo
leaves out the dumb example application. So you can edit
settings and plugins here as you like - but you can't see the
effects this would have on the demo app.
Select one of the plugin or setting categories.
In a real application, you wouldn't leave this admin start page empty, of course.
Oh, and of course, you'd integrate this interface with your authorization code. It is meant for administration, and not to be accessed by ordinary visitors.