Where to store user settings in Symfony 2 and which service is responsible for it?

Question

symfony

I heard that user settings can be stored in the database, uml, ini and service container.
Actually, here are the questions:
1. Where can I store settings in Symfony 2?
2. Which option is better?
3. What class / method / service is responsible for this? In which direction to dig?

Answer 1

what does "custom settings" mean? project configs? By default in yaml, in app/config. symfony/config is responsible for configs, for bundles it is configured in the DependenciInjection directory.