session_cache_expire( 20 );
session_start(); // NEVER FORGET TO START THE SESSION!!!
$inactive = 1200;
if(isset($_SESSION['start']) ) {
$session_life = time() - $_SESSION['start'];
if($session_life > $inactive){
header("Location: user_logout.php");
}
}
$_SESSION['start'] = time();
if($_SESSION['valid_user'] != true){
header('Location: ../index.php');
}else{
I'm making an online examination system. I'm using PHP and MySQL.
I want to set the session time, but don't know how. Please help me.
Thanks in advance