Favorites the status specified in the ID parameter as the authenticating user. Returns the favorite status when successful.
use Widop\Twitter\Rest\Favorites\FavoritesCreateRequest;
$request = new FavoritesCreateRequest('123');
$request->setId('123');
$id = $request->getId();
$request->setIncludeEntities(true);
$includeEntities = $request->getIncludeEntities();
$tweetFavorited = $twitter->send($request);
You can get more informations here.