prepare("INSERT INTO sessions (id, user_data) VALUES (:id, :user_data)"); $stmt->execute([ ':id' => $sessionId, ':user_data' => json_encode($_SESSION), ]); // Redirect the user to a new page header('Location: https://example.com/my_account.php'); exit; ?>This code starts a session, sets a couple of data values in the session, and then saves the session ID and user data to a database. It then redirects the user to a new page. This example demonstrates how the `session_id()` function can be used to uniquely identify a user's session in a database. Package library: The `session_id()` function is built into PHP and does not require a separate package or library.