Domain-Driven Design in PHP

Modules in the Infrastructure Layer

Thus far, we've been discussing how we structure and organize code in the Domain layer, but we've said almost nothing about the Infrastructure layer. And since we're using Hexagonal Architecture to inverse the dependency between the Domain layer and the Infrastructure layer, we'll need a place where we can put all the implementations of the interfaces defined in the Domain layer. Returning to the example of the billing context, we need a place for the implementations of BillRepository, OrderRepository, and WaybillRepository.

It's clear that they should be placed into the Infrastructure folder, but where? Suppose we decided to use Doctrine ORM to implement the persistence layer. How do we put the Doctrine ...