Question

I have a single form for login for both admin and general users. I would like to time the sessions out after 30 minutes how would I amend my current code to do that?

<?php
    session_start(); //Start the session
    define(ADMIN,$_SESSION['username']); //Get the user name from the previously registered super global variable

    if(!session_is_registered("admin")){ //If session not registered
        header("location:../index.php"); // Redirect to login.php page
    }
?>

Answer 1

Here is the code to clear the session for a specified time.

To clear the inactive session, you have to renew the session timeout every page.
Hope it helps.

For reference, http://bytes.com/topic/php/insights/889606-setting-timeout-php-sessions

session_start();
$timeout = 60; // Number of seconds until it times out.

// Check if the timeout field exists.
if(isset($_SESSION['timeout'])) {
    // See if the number of seconds since the last
    // visit is larger than the timeout period.
    $duration = time() - (int)$_SESSION['timeout'];
    if($duration > $timeout) {
        // Destroy the session and restart it.
        session_destroy();
        session_start();
    }
}

// Update the timout field with the current time.
$_SESSION['timeout'] = time();