Caucho Resin adds PHP writes:

Caucho, the company behind the open source application server Resin and the open Web Services protocols Burlap and Hessian, has recently added PHP to its list of supported features. Apparently, the PHP pages are compiled in the background to byte-code, and the resulting performance is six times that of Apache mod_php!

Resin has always been one of the sweetest application servers and now it got even better and more attractive.