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Example code of ajgarlag/feature-flag-bundle

Informations about the package feature-flag-bundle

FeatureFlag Bundle

The FeatureFlag Bundle allows you to split the code execution flow by enabling features depending on context.

It provides a service that checks if a feature is enabled. Each feature is defined by a callable function that returns a value. The feature is enabled if the value matches the expected one (mostly a boolean but not limited to).

This bundle code has been borrowed from https://github.com/symfony/symfony/pull/53213.

[!IMPORTANT]
The purpose of this bundle is to allow you to test the code proposed in the PR.

🚀 Getting Started

Follow these steps to install and use the bundle in your Symfony application.

Step 1: Download the bundle

Open a command console, enter your project directory and execute the following command to download the latest stable version of this bundle:

Step 2: Enable the bundle (for non-Flex applications)

Then, enable the bundle by adding it to the list of registered bundles in the config/bundles.php file of your project:

✨ Declaring features with attributes

You can declare features using the #[AsFeature] attribute. This allows you to autoconfigure your features as services.

On a class

You can use the attribute on an invokable class:

The feature will be named xmas. If you don't provide a name, the FQCN of the class will be used.

You can also use the method property of the attribute to specify a method to call on the service.

On a method

You can also use the attribute on a method of a service. The method must be public.

🗺️ Routing integration

The bundle provides two functions to use in route conditions: feature_is_enabled and feature_get_value.

You can use them to enable or disable routes based on features.

You can also use feature_get_value to check for a specific value.

🧩 Providers

Providers are responsible for returning the feature callables. You can create your own provider by implementing the ProviderInterface.

Any service that implements ProviderInterface is automatically registered as a provider. The bundle comes with a ChainProvider that allows you to combine multiple providers. The first provider that returns a feature wins.

The ProviderInterface

To create your own provider, you need to implement the ProviderInterface.

The get method must return a callable if the provider has the feature, or null otherwise.

Doctrine example
Gitlab example First, declare a service to interact with the [Unleash](https://www.getunleash.io/) API.

Priority

You can control the order of the providers in the chain using the priority attribute on the ajgarlag.feature_flag.provider tag.

You can use the #[AutoconfigureTag] attribute to set the priority of your provider.

Providers with a higher priority will be checked first.

🎨 Twig extension

The bundle provides two functions to use in Twig templates: feature_is_enabled and feature_get_value.

All versions of feature-flag-bundle with dependencies

PHP Build Version
Package Version
Requires php Version >=8.1
psr/container Version ^1.1|^2.0
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