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PHP Reactive Programming

PHP Reactive Programming

By : Sikora
2 (1)
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PHP Reactive Programming

PHP Reactive Programming

2 (1)
By: Sikora

Overview of this book

Reactive Programming helps us write code that is concise, clear, and readable. Combining the power of reactive programming and PHP, one of the most widely used languages, will enable you to create web applications more pragmatically. PHP Reactive Programming will teach you the benefits of reactive programming via real-world examples with a hands-on approach. You will create multiple projects showing RxPHP in action alone and in combination with other libraries. The book starts with a brief introduction to reactive programming, clearly explaining the importance of building reactive applications. You will use the RxPHP library, built a reddit CLI using it, and also re-implement the Symfony3 Event Dispatcher with RxPHP. You will learn how to test your RxPHP code by writing unit tests. Moving on to more interesting aspects, you will implement a web socket backend by developing a browser game. You will learn to implement quite complex reactive systems while avoiding pitfalls such as circular dependencies by moving the RxJS logic from the frontend to the backend. The book will then focus on writing extendable RxPHP code by developing a code testing tool and also cover Using RxPHP on both the server and client side of the application. With a concluding chapter on reactive programming practices in other languages, this book will serve as a complete guide for you to start writing reactive applications in PHP.
Table of Contents (12 chapters)
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Chapter 6. PHP Streams API and Higher-Order Observables

In this chapter, we'll introduce a lot of new features that we need for the next chapter. Almost everything covered in this chapter is related to PHP Streams API, Promises and event loops (reactphp/event-loop project in our case). This also includes a couple of more advanced RxPHP operators working with so-called higher-order Observables.

In particular, in this chapter, we'll do the following:

  • Quickly look at using Promises in PHP with the reactphp/promise library
  • Introduce PHP Streams API and, with examples, see what benefits it brings with minimal or no effort
  • Examine the internals of StreamSelectLoop class, this time in the context of PHP Streams API
  • See what caveats we need to be aware of when working with non-blocking code in event loops
  • Talk about higher-order Observables
  • Introduce four new and more advanced operators, concatAll()mergeAll()combineLatest() and switchMap(), which are...
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