C# Http Server with PHP

I'm currently writing an http server in C# and I'm planning on allowing it to use PHP. How does PHP work? Like, the compiler or whatever it uses. I was thinking it takes php files in input and outputs the html or whatever file for the http server to give to the user's request. Is开发者_如何学C it possible to call on the php compiler or whatever with the file requested by the user? Please tell me if I'm thinking about this the wrong way.

Thanks

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There are a couple ways to interact with PHP. The easiest way to get started is to implement CGI in your program.

Wikipedia has a nice example.

Basically, you execute PHP-CGI.exe, and send/receive data over standard in/out.