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# Standalone Usage
You can use RoadRunner library as the component, without bringing the whole application into your project.
In order to create PHP worker pool on Golang:
```golang
srv := roadrunner.NewServer(
&roadrunner.ServerConfig{
Command: "php client.php echo pipes",
Relay: "pipes",
Pool: &roadrunner.Config{
NumWorkers: int64(runtime.NumCPU()),
AllocateTimeout: time.Second,
DestroyTimeout: time.Second,
},
})
defer srv.Stop()
srv.Start()
res, err := srv.Exec(&roadrunner.Payload{Body: []byte("hello")})
```
Worker (echo) structure would look like:
```php
<?php
/**
* @var Goridge\RelayInterface $relay
*/
use Spiral\Goridge;
use Spiral\RoadRunner;
ini_set('display_errors', 'stderr');
require 'vendor/autoload.php';
$rr = new RoadRunner\Worker(new Spiral\Goridge\StreamRelay(STDIN, STDOUT));
while ($body = $rr->receive($context)) {
try {
$rr->send((string)$body, (string)$context);
} catch (\Throwable $e) {
$rr->error((string)$e);
}
}
```
Make sure to run `go get github.com/spiral/roadrunner` and `composer require spiral/roadrunner` to load necessary dependencies.
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