class UserController { public function index() { // retrieve all users from the database $users = User::all(); return view('users.index', compact('users')); } public function show($id) { // retrieve a specific user by id $user = User::find($id); return view('users.show', compact('user')); } }This example shows a typical UserController with two methods: index() and show(). The index() method retrieves all users from the database and returns them to a view for display, and the show() method retrieves a specific user by their ID and returns them to a view for display. The package/library used in this example is likely a database ORM such as Eloquent, which is often included as part of Laravel, a popular PHP web framework.