Chapter 3. Writing a Reddit Reader with RxPHP

In previous chapters, we talked a lot about asynchronous programming in PHP and how this relates to reactive programming, in particular, how to start using RxPHP, and how to use common PHP functions such as proc_open() and cURL asynchronously.

This chapter will cover writing a CLI Reddit reader app using RxPHP, Symfony Console, and Symfony Process components. We're also going to use most of what we've learned in the previous chapter:

• We'll look in more depth into what happens internally when creating Observable chains and subscribing to Observables.

• We'll see how Disposables are used in the default classes that come with RxPHP, and how these are going to be useful for unsubscribing from Observables in our app.

• Subjects can sometimes simplify our lives when working with operator chains.

• How to use Observable::create() and Observable::defer() static methods to create new Observables with custom logic on subscription.

• Symfony Console library is going...