Hi,

I'm working with grpc, when I write client code with PHP, I found little document about grpc php extension.

I only found: http://www.grpc.io/grpc/php/namespaces/Grpc.html.

I'm really need some document about what is Grpc\ChannelCredentials, Grpc\\ServerCredentials, etc, and the methods, properties is has.

Because I am not familiar with c, so it is hard to read the source code under grpc/grpc/src/php/ext.

Really need some help from grpc php group!!!

Thanks