Zf2 where is it more correct to define helper?

Question

Zend Framework

Hello,
there are a couple of controllers from which you need to send almost identical letters. I want to declare somewhere a class that will create and send these letters. Where is the best place and how to do it? Create a Helpers folder where Controllers and Models are?

Answer 1

Yes

Answer 2

there are a couple of controllers from which you need to send almost identical letters

This should not be in controllers. This is what services are for.
Controllers should be as dumb as possible, their task is to work with input / output. That is, we take the request, understand what needs to be done and tell it to the services. Those do, give the result to the controller, which returns it to the user.