Service-oriented architecture (SOA)

In service-oriented architecture, the application's components provide services to each other on a defined protocol. Each component is loosely coupled with each other, and the only way of communication between them is through the services they provide.

In PHP, Symfony provides the best way to have SOA as it is mainly an HTTP-centric framework. Symfony is the most mature, well-tested collection of libraries that are widely used by other PHP frameworks, such as Zend Framework, Yii, Laravel, and others.

Let's consider a scenario where we have a backend and a frontend for a website and a mobile application. Normally, in most applications, the backend and frontend run on the same code base and on a single access point, and an API or web service is built for mobile applications to communicate with this backend. It is good, but we need great. So, for high performance and scalable applications, the separate components run independently of each other. If they need...