Open Swoole

Open Swoole is a PHP extension that adds an event-driven server, coroutines and fibers to PHP. A PHP application uses it to run its own HTTP, WebSocket and TCP servers, and the extension runs inside a PHP command-line process. The server can be run directly on the network, or placed behind Apache or Nginx as a proxy target.

The extension is installed with PIE, PECL, a Docker image, an Ubuntu package archive, an RPM repository or from source. The project’s own site describes it as previously named Swoole, and Transfon Ltd publishes it.

Worth knowing

The server is a long-running process inside PHP, not a script that runs per request.