Using comet with PHP?

Question

I was thinking of implementing real time chat using a PHP backend, but I ran across this comment on a site discussing comet:

My understanding is that

Answer 1

A new module just came out for the nginx web server that'll allow Comet with any language, including PHP.

http://www.igvita.com/2009/10/21/nginx-comet-low-latency-server-push/