In this chapter, we touched upon RxPHP and React, the two libraries that promise to bring reactive programming to PHP. While RxPHP brings the powerful  observables packaged in composable-looking syntax, React enriches our experience with event-loop implementation. To carefully, we should emphasize that this is still a relatively experimental area for PHP, and far from ready for mainstream production use. It does, however, demonstrate that PHP is not limited with its runtime capabilities and shows promise in the reactive area.
Moving forward, we will shift our focus on common design patterns found in modern PHP applications.
