FeatureFlagEnum.php

<?php
namespace App\FeatureFlag\FeatureFlagEnum;

trait FeatureFlagEnumTrait
{
    public static function names()
    {
        return array_column(self::cases(), 'name');
    }
}
// feature flag to resolve in a database
enum DatabaseStorageFeatureFlagEnum
{
    use FeatureFlagEnumTrait;

    case fake_payment;
    case new_checkout_api;
}
// feature flag to resolve with A/B testing
enum ABTestingFeatureFlagEnum
{
    use FeatureFlagEnumTrait;

    case pay_with_paypal;
}
// feature flag to resolve with Symfony parameters
enum ParameterFeatureFlagEnum
{
    use FeatureFlagEnumTrait;

    case use_stripe;
    case product_v2;
}
// feature flag to resolve with a period
enum PeriodFeatureFlagEnum
{
    use FeatureFlagEnumTrait;

    case maintenance;
}