Question

Is it possible & if so, how can I allow users to only create a certain number of pages. ie. When they sign up, only allow them to create one page?

Answer 1

Off the top of my head, the following approach ought to work:

1. Hook into the userCan event for the ‘edit’ action, check the page’s existence (i.e. $title->exists()) and if it doesn’t, consult some stored count (see below), and if the decision reached is to disallow creation, set $result to false and return false to stop further hooks overriding the decision.
2. Hook into the ArticleInsertComplete event and update some stored count to reflect that the user ($user) has created another page.

The decision in #1 can be expanded via additional logic to support multiple policies in conjunction with, e.g. automatic rights assignment; for example, to allow users to create more than one page after they’ve reached so-called ‘auto-confirmed’ status, or to ignore the check for administrators or other users with specific rights.