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

if you are using session id. then you can do this

session_start();
unset($_SESSION['id']);
session_destroy();

for cookies you can set the cookie time to some past date.