Senior LevelPHP 8+
How does RoadRunner integrate Go (Golang) with PHP using Goroutines and IPC over Unix sockets?
❓ Interview Prompt: Explain RoadRunner application server architecture, Go process manager, Inter-Process Communication (IPC) over Unix domain sockets, and persistent workers.
RoadRunner is a high-performance open-source application server and process manager written in Go (Golang) designed specifically for PHP.
Architecture Mechanics:
1
Go Front-End: RoadRunner runs as a Go binary handling HTTP, gRPC, and WebSocket connections with Go's ultra-fast Goroutine event loops.
2
Persistent PHP Workers: RoadRunner maintains a pool of persistent PHP CLI worker processes.
3
IPC Transport: Communicates with PHP workers over fast Unix Domain Sockets or TCP using binary IPC protocols.
4
Performance Impact: Eliminates PHP-FPM boot overhead while giving PHP applications access to Go's concurrency speeds!
Code Implementation Example
php
<?php
// RoadRunner Worker Entry Point (.rr.yaml)
use Spiral\RoadRunner\Worker;
use Spiral\RoadRunner\Http\PSR7Worker;
use Nyholm\Psr7\Factory\Psr17Factory;
require __DIR__ . '/vendor/autoload.php';
$worker = Worker::create();
$psrFactory = new Psr17Factory();
$psr7 = new PSR7Worker($worker, $psrFactory, $psrFactory, $psrFactory);
// Loop processing incoming HTTP requests from Go parent process!
while ($req = $psr7->waitRequest()) {
try {
$res = new Nyholm\Psr7\Response(200, [], 'Hello from RoadRunner!');
$psr7->respond($res);
} catch (Throwable $e) {
$psr7->respond(new Nyholm\Psr7\Response(500, [], 'Error'));
}
}💡RoadRunner worker loop receiving HTTP requests from Go parent process over IPC.
🎯 Interview Key Takeaway
RoadRunner uses Go Goroutines for network front-ends and communicates with persistent PHP CLI workers over fast Unix domain sockets.
#RoadRunner#Go#Application Server#Golang#Senior
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