How can PHP developers ensure that expired sessions are not mistakenly used as new sessions?

To ensure that expired sessions are not mistakenly used as new sessions, PHP developers can implement a check to verify the session expiration time before allowing access to the session data. This can be done by comparing the current time with the session expiration time stored in the session data. If the session has expired, the data should not be accessed or a new session should be created. 

session_start();

if(isset($_SESSION['expire_time']) && $_SESSION['expire_time'] < time()) {
    // Session has expired, destroy it
    session_unset();
    session_destroy();
    
    // Redirect to login page or perform other actions
    header("Location: login.php");
    exit;
}

Keywords

PHP sessions expired security validation

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