Howtoforge posted a tutorial about installing Lighttpd with PHP5 and MySQL support on Ubuntu 10.04

Lighttpd is a secure, fast, standards-compliant web server designed for speed-critical environments. This tutorial shows how you can install Lighttpd on an Ubuntu 10.04 server with PHP5 support (through FastCGI) and MySQL support.

  Installing Lighttpd With PHP5 And MySQL Support On Ubuntu 10.04