Comet is new Ajax and server pushing technology.
If it use then create system of Event Driven Web Application.
It is required Jetty, mod_pubsub, POE, Twisted, Nevow and other higher-level event-driven interface. and PHP isn't compatible.
I try to use Only PHP and create HTTP Streaming System.
* System
Web Server: LighttpdPHP: PHP5.6.1(CGI)
[More:]
* Opera
Opera9 or higher is supported HTTP Streaming protocol (called
Server-sent DOM events).
It have special tag (event-source) and implant HTML Web Page.
The event-source tag can add the DOM Event.
=>
Opera Server-sent Events Demo
=>
Opera SSE source
* Firefox
Firefox... sorry. Mozilla is multipart streaming support.
If you use then throw http multipart header (multipart/x-mixed-replace).
=>
Firefox HTTP Multipart Streaming Demo
=>
Firefox Multipart SSE Source
* Internet Explorer(IE)
IE don't have streaming system.
(・-・ ) ・・・
I think it is forceful but there is no other way.
So What?
It use
Iframe.
=>
IE HTTP Streaming? Demo
=>
IE HTTP Streaming Source