How to do protobuf deserialization in PHP

I am getting a response from server which I need to deserialize using protobuf. I got to know that I need to have .proto files which will contain definitions.

How can I parse the response string and create PHP objects?

Update : I tried to use available library (http://code.google.com/p/pb4php/) but it's throwing an exception with the message '开发者_运维技巧Protofile type uint64 unknown!'. Any idea how can I avoid it?

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You have to download protobuf lib for php. It comes with compiler (generator) that will generate php classes from .proto for you.

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I looked into code of library and found out that there is no support for uint64. Now the field which I am getting as uint64 from server is expiry time. Even if I consider 100 years as expiry, It would never get beyond int range. So I have linked uint64 to parsing of int data type and it is working fine for me.

Though it is not a good solution and completely dependent on personal usage.