This config is built on an Ubuntu 11.04 server.
Software is nginx, php-fpm (php5-fpm).
For performance, it's recommended to run php-fpm in SOCKET mode, instead of accessing via IP:PORT. That is the method shown below.
It seems many people is trying to make Wordpress and Yii work together. I got stuck with the same problem, but now I think I have achieved doing it, after a lot of hard thinking and many work hours spent.