Convert C# code into PHP

Max budget: $15 I need a code from c# to be converted into PHP. I am PHP developer myself but few things are messing up and I am not able to make it work. c# code is attached. PM before you start working on it and you are 100% sure you can make it work. If I agree, you have to start and finish and PM me code. if it will work, I will accept and release payment. (you can see my "Freelancer" profile if you have doubt about payment). If It will not work, either I will give you complete details or find someone else. This code is take from Android Game, Unity Assembly files (.dll) and it converts HTTP encoded response and I need this function in PHP.