title: How to have a global variable coming from db in symfony template?
body: <p>How can I have a global variable in symfony template?
  I did read <a href="http://symfony.com/doc/current/cookbook/templating/global_variables.html" rel="noreferrer">this</a>
  but I prefer to fetch parameter from database, I think this service will be loaded on startup before it can fetch anything from db. Is it possible to do a trick to do so?</p>