$user_id = 123; $new_last_name = "Doe"; $user = new User(); $user->setLastName($user_id, $new_last_name);
$new_last_name = "Doe"; $_SESSION['user']['last_name'] = $new_last_name; $user = new User(); $user->setLastName($new_last_name);This code example uses the setLastName function to update the last name of a user in the session variable with the value of "Doe". Package library: PHP's built-in session library.