At Fluentd Casual Talk #2 held today, I gave a presentation titled "Log Everything with Fluentd".
It's based on my work for Puboo, an e-book publishing service. I couldn't use fluent-logger-php, but it eventually was good fo me. As I wrote in the slides above, I could hack up some useful modules as a result. I think the plugins can help you. Give a try to it.
I appear from 14:35 in the movie below: