On NuCleuZ's blog today, there's a quick post with a look at a project brought about by the Google Summer of Code - a Mono compiler.

Looks like Google's summer of code had a project for PHP -> mono compiling php4mono: PHP4Mono is a compiler that enables Mono to run PHP code. It is written in C# and translates PHP scripts to Common Intermediate Language (CIL).

Just tested this out on OSX and it works with the enclosed samples, but as the project states: there are some features that haven't been implemented yet, but this was a final year project and development and will most likely be developed further.

They include two examples in the package to get you started - though the documentation is a bit limited so far...