User insertion/removal (category)
Handles registering a new user.
A simpler way of inserting a user into the database.
Remove user and optionally reassign posts and links to another user.
Creates a WordPress user in the Database.
Notifies by email the site administrator about new user registration, and sends the user an email with a login and password.
Update a user data in the database. Work with both tables wp_usermeta and wp_users.