Implementing CQRS And Event Sourcing In PHP For Scalable Systems

Event-Driven Architecture (EDA) focuses on decoupling systems and making them more flexible, scalable, and maintainable by responding to events. In PHP, two important patterns that are often used in EDA are Event Sourcing and Command Query Responsibility Segregation (CQRS). Here’s a step-by-step guide to implementing them using PHP, along with a hands-on example.

  
  
  Concepts Overview

  
  
  1. Event Sourcing:

Instead of persisting just the final state of the application in the database, every change (event) to the application state is stored.
Example: If you have an order system, inst...