If you're a PHP Developer, Architect, or Tech Lead, we highly recommend this book. It will help you become a better professional. It will give you a new overview of and approach to the applications you're developing. If you're a Junior profile, getting into Value Objects, Entities, Repositories, and Domain Events is important in order to model any Domain you'll face in the future. For an average profile, understanding the benefits of Hexagonal Architecture and the boundaries between your framework and your Application is key for writing code that's easier to maintain in the real world (framework migrations, testing, etc.). More advanced readers will have fun both exploring how to use Domain Events in order to integrate Applications and delving deeper into Aggregate design.

Although Domain-Driven Design is not about technology, you still need it to make HTTP requests to access your Domain. Throughout the book, we recommend using specific PHP frameworks and libraries, such as Symfony, Silex, and Doctrine. For some examples, we also use specific technologies, such as MySQL, RabbitMQ, Redis, and Elasticsearch. However, most important are the behind-the-scenes concepts — concepts that are applicable regardless of the technology used to implement them.

Additionally, the book is loaded with tons of details and examples, such as how to properly design and implement all the building blocks of Domain-Driven Design — including Value Objects, Entities, Services, Domain Events, Aggregates, Factories, Repositories, and Application Services — with PHP. It explains what the role of the main PHP libraries and frameworks used in Domain-Driven Design are. The book also teaches how to apply Hexagonal Architecture within your application, regardless of whether you use an open source framework or your own one. Finally, it shows how to integrate Bounded Contexts using REST frameworks and messaging mechanisms. If you're interested in any of these subjects, this book is for you.