// Get user data from database $user = $db->getUserById($userId); // Update user's email address $user->email = 'newemail@example.com'; // Save changes to database $db->saveUser($user);In this example, we first retrieve the user data from the database using a hypothetical `getUserById()` method. We then update the user's email address property using the assignment operator (`=`). Finally, we save the changes to the database using a hypothetical `saveUser()` method. The package library used in this example is not specified, as the PHP object update can be used with any custom or third-party library that supports object-oriented programming in PHP.