How to Completely End a Session, Even with an Open Browser
When a user logs out of a website but leaves their browser open, it's crucial to ensure their session is entirely terminated. However, conventional methods using session_start(), unset($_SESSION), session_unset() and session_destroy() may not be sufficient for this task.
According to PHP documentation, to thoroughly end a session, the session ID must also be deleted. If cookies are used to transmit the session ID, they need to be erased. setcookie() can be employed to achieve this.
Below is a comprehensive example borrowed from the PHP manual:
<code class="php"><?php // Initialize the session. // If you use session_name("something"), recall it here! session_start(); // Remove all session variables. $_SESSION = array(); // Delete the session cookie if necessary to terminate the session. // Warning: This action destroys the session, not just its data! if (ini_get("session.use_cookies")) { $params = session_get_cookie_params(); setcookie(session_name(), '', time() - 42000, $params["path"], $params["domain"], $params["secure"], $params["httponly"] ); } // Finally, destroy the session. session_destroy(); ?></code>
By following this updated approach, you can effectively eliminate all traces of a session, ensuring the user's sensitive information is protected even if they keep their browser open.
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