how to logout from a php session - session_destroy doesn't seem to be enough

Question

I\'m trying to learn PHP and using sessions. I seen examples about using session_destroy on logout, but I see this in the php documentation:

In order

Answer 1

Only use session_unset() for older deprecated code that does not use $_SESSION.

session_start();

session_unset($_SESSION['email-user']); session_destroy();`