PhpPeanuts offers an as soon as classes are built. This user interface is made of that contain and widgets. Pages and parts use as templates. If they contain forms that change the state of the domain model or session, an process the form submit.
Pages, parts, widgets, actions and skins can be overridden and specialized. The flexible page composition and request dispatch allow this in many cases without specialization of other pages, parts of skins that contain the specialized ones or link to them.