I want to implement a website that has different types of users. I want that when a user posts something, the admin will be notified automatically. I have read about WebSockets and found some examples but mostly of them are about chat application. I just want a notification update. I just want to have a simple one.
I really don't have any idea how to implement that one. My main problem is the connection between the admin and a normal user. I want a specific client to be updated as well whenever the admin updates something. I don't want all the logged in user to be notified.
Comet does look pretty fiddly to set up. I once tried to implement it from the APE site, but I failed miserably. I'd have a little play with the socket.io version and see how far you get. Then when you hit the wall with regard to user access come back. I'm sure that other people have tried what you're trying and there will be forums and tutorials online. I haven't seaarched for them, but i'd be very very surprised if there aren't any.
I've not been able to find much on socket.io and PHP, so perhaps wesockets would be better: