Generally, some sort of authorization is used to verify the access of users to a forum or group. Allowing users to join to a forum is one way of providing authorization. There are several techniques for implementing the join feature for forums, as listed in the following:
- Automatic Join: In this technique, anyone can click on the Join button to join to the forum and the user will be automatically added to the forum. This is useful for public forums where you don't want to keep content private.
- Request to Join: This technique requires the user to click on the Join button and wait for the approval from administrators of the forum. Until the request is approved, the user won't be able to use the forum.
- Invite to Join ...
