OpenSwoole¶
OpenSwoole is a PECL extension providing an event-driven, asynchronous, coroutine-based programming framework for PHP. It is a community fork of Swoole, created after a licensing and governance disagreement, and both projects share most of their API and internals.
OpenSwoole replaces PHP’s traditional request/response, process-per-request model with a long-running server process: an HTTP, WebSocket, or TCP/UDP server that stays resident in memory, handles many connections concurrently through coroutines, and dispatches blocking calls, such as database queries or file I/O, transparently as non-blocking, cooperative tasks. This removes most of the per-request bootstrap cost, such as re-parsing configuration or re-establishing framework state, that a classic PHP-FPM request pays every time.
Because the process is long-running, code that assumes a fresh, request-scoped global state, a common assumption in traditional PHP applications, must be written carefully to avoid leaking state between requests handled by the same worker.
<?php
$server = new OpenSwoole\Http\Server('0.0.0.0', 9501);
$server->on('request', function ($request, $response) {
$response->header('Content-Type', 'text/plain');
$response->end('Hello from OpenSwoole' . PHP_EOL);
});
$server->start();
?>
See also OpenSwoole project.
Related : Swoole, Coroutine, Fibers, Green Thread, Asynchronous, Parallel
Related packages : openswoole/core
