In recent years, more and more PHP developers are interested in asynchronous frameworks, like Swoole. However, Swoole brings more than asynchronous programming to PHP; there are a few mind-blowing features in Swoole that many developers are not yet aware of. This article discusses how to use Swoole to build an application server to serve web requests, handle cron jobs, and process job queues without relying on any third-party applications or software.