OpenFeature Flagd Bundle

Symfony bundle that registers the OpenFeature Flagd provider as a Symfony service.

Flagd in Symfony, one composer require away.

Requirements

• PHP 8.2+
• Symfony 6.4, 7.4 or 8.x
• A PSR-18 HTTP client (e.g. symfony/http-client, guzzlehttp/guzzle) and PSR-17 factories (e.g. nyholm/psr7)
• A running flagd server

Installation

composer require aubes/openfeature-flagd-bundle symfony/http-client nyholm/psr7

Note: Without a Symfony Flex recipe, register the bundle manually in config/bundles.php:

Aubes\OpenFeatureFlagdBundle\OpenFeatureFlagdBundle::class => ['all' => true],

Configuration

# config/packages/open_feature_flagd.yaml
open_feature_flagd:
    host: '%env(FLAGD_HOST)%'    # default: localhost
    port: 8013                    # default: 8013
    protocol: http                # default: http (http or grpc)
    secure: false                 # default: false

    # PSR-18 client service ID (default: Psr\Http\Client\ClientInterface).
    # Use this to wire a scoped or custom HTTP client (base URI, timeouts, retry, logging...).
    http_client: ~

Custom HTTP client

By default, the bundle references the autowired Psr\Http\Client\ClientInterface. To use a scoped Symfony HTTP client:

# config/packages/framework.yaml
framework:
    http_client:
        scoped_clients:
            flagd.client:
                base_uri: '%env(FLAGD_URL)%'
                timeout: 2
                max_duration: 5

# config/packages/open_feature_flagd.yaml
open_feature_flagd:
    host: flagd
    http_client: flagd.client

Usage

Inject the provider directly

This bundle registers FlagdProvider as a Symfony service. You can inject it directly and use the OpenFeature API:

use OpenFeature\OpenFeatureAPI;
use OpenFeature\Providers\Flagd\FlagdProvider;

class MyService
{
    public function __construct(private FlagdProvider $provider)
    {
    }

    public function doSomething(): void
    {
        $client = OpenFeatureAPI::getInstance()
            ->setProvider($this->provider)
            ->getClient();

        if ($client->getBooleanValue('dark_mode', false)) {
            // ...
        }
    }
}

Pair with aubes/openfeature-bundle (optional)

If you want framework-level sugar on top of the OpenFeature SDK (#[FeatureFlag] / #[FeatureGate] attributes, Twig helpers, request-scoped evaluation context, profiler integration), install aubes/openfeature-bundle alongside and point it at this provider:

# config/packages/open_feature.yaml
open_feature:
    provider: OpenFeature\Providers\Flagd\FlagdProvider

It's entirely optional: this bundle works fine on its own with the plain OpenFeature SDK.

License

MIT. See LICENSE.