How to create a custom yaml config file in Symfony

Question

What I want to do is quite simple: store data in a custom config file that I want to read later on.

I created my file something.yml that I put in the global

Answer 1

Do not modify the index.php this is dirty!

Juste add this line to your app/frontend/config/frontendConfiguration.class.php

require_once($this->getConfigCache()->checkConfig('config/something.yml'));

(adapt with your own app name)