I've already done something like this. I've implemented a Rack style web server in PHP: http://github.com/dhotson/kelpie http://github.com/dhotson/kelpie I als

I've already done something like this. I've implemented a Rack style web server in PHP: http://github.com/dhotson/kelpie http://github.com/dhotson/kelpie I also wrote an extension for the mongrel HTTP parser, but you could probably get away with a half-assed pure PHP HTTP parser. http://github.com/dhotson/httpparser-php http://github.com/dhotson/httpparser-php It sounds crazy but it actually works pretty well. :-)