Based on the available knowledge sources, I don't have specific information about OpenFeature providers for PHP, .NET, or Java in the context of GrowthBook. However, I can provide some relevant information about GrowthBook's SDK support for these languages: 1. GrowthBook offers official SDKs for various languages, including PHP, C# (.NET), and Java [SDKs](
https://docs.growthbook.io/lib). 2. For PHP, there's an official SDK available that can be installed via Composer [PHP SDK](
https://docs.growthbook.io/lib/php). 3. For .NET, there's a C# SDK available [SDKs](
https://docs.growthbook.io/lib). 4. Java is also supported with an official SDK [SDKs](
https://docs.growthbook.io/lib). While these SDKs exist, the knowledge sources don't specifically mention OpenFeature providers for these languages. The OpenFeature support is explicitly mentioned only for the JavaScript/Web environment [OpenFeature Provider](
https://docs.growthbook.io/lib/js#openfeature-provider). It's worth noting that GrowthBook has shown interest in expanding OpenFeature support. In a previous conversation, they added GrowthBook to the list of interested parties for the OpenFeature project [OpenFeature Interest](
https://linen.growthbook.io/t/427908/hi-are-you-familiar-with-this-openfeature-standard-any-thoug). If you're interested in OpenFeature providers for PHP, .NET, or Java, you might want to reach out directly to the GrowthBook team or check their GitHub repository for any ongoing developments or opportunities to contribute.