Where to store custom functions in Symfony 2?

Question

symfony

Hello! I am new to Symfony 2. I am creating a website, I wrote a couple of functions to display "breadcrumbs". Where are these functions stored? I wrote them in MainController, but judging by the documentation, this is not the right solution. I think to create a separate class for them. But in what directory to store it?

Answer 1

https://symfony.com/doc/master/book/service_contai...
You need to use services.