ZblogPHP template DIY: judge whether the user logs in and distinguishes levels ZblogPHP system divides users into 6 levels: 1 ->administrator, 2 ->website editor, 3 ->author, 4 ->collaborator, 5 ->reviewer, 6 ->visitor. Among them, the visitor is also a member level, different from ordinary website visitors. The registration function implemented by plug-ins or themes usually provides three levels of authors, collaborators, and reviewers for users to choose from to register. The differences of user permissions at different levels will be mentioned later in this article