How to tell if a session is active?

Question

Per request, there are a few different ways that you can tell whether or not a session has been started, such as:

$isSessionActive = (session_id() != \"\");
         


        

Answer 1

The following code only dumps one session_id() for me, not two

session_start();
echo session_id();
session_destroy();
echo session_id();

If you're having difficulties with this still you can try creating a variable to check, that you destroy when you destroy the session.

session_start();
$_SESSION['intialized'] = 'This will not print';
$_SESSION = array(); // Unset all variables
session_destroy();
echo $_SESSION['initialized']; // No output