Checking for PHP session without starting one?

Question

Is it possible to check for a session with out starting one?

The reason that I ask is, the app I am developing has an integrated admin interface. So when an admin is logg

Answer 1

Here's a function that will do what you ask, which is checking whether a session exists before starting it:

function sessionExists() {
    return (isset($_COOKIE[session_name()]));
}

If you want to test for it in the same request that you created it, you can do this instead:

function sessionExists() {
    return (isset($_SESSION) || isset($_COOKIE[session_name()]));
}