问题
I know that is used in a drupal module to specify that only anonymous users can see that module. What would be the callback that specifies only logged in users ?
I have a page that I only want accessible to logged in users.
Thank You
回答1:
It is the user_is_logged_in() function, which basically checks that the user's ID ($GLOBALS['user']->uid) is greater than zero.
The function converts the uid into a Boolean type and returns TRUE for any user that is logged in, because they would have a uid that is a positive number. Drupal assigns anonymous users a uid of 0, which is FALSE when converted into a Boolean.
来源：https://stackoverflow.com/questions/3035132/what-is-the-opposite-of-access-callback-user-is-anonymous