C# – How to convert code from C# to PHP


I have a business logic classes that are written in pure C# (without any specific things from this language) and I would convert this code into PHP. I can write my own parser, but think if I could someone did it before me.

Could you please tell me where can I find this kind of converter?

Ps. As I've written I use only plain C# programming in this language. Only arguments, declarations of variables, equations and control statements.