How to implement Server push / long polling / comet using PHP and Javascript

Question

How can I implement the comet / server push design pattern using PHP and Javascript? Essentially what I would like is something like this:

User clicks a 'submit' button
Javascript shows a message like 'Processing 0 / 100 items'
Whenever a new item is processed, the php / server pushes out an update, and the javascript changes the message to 'Processing 2/100 items, 3/100 items, and so on'.

How can I do this? Any links/info please?

score 2 · Answer 1 · answered Jan 10 '10 at 16:35

2

Comet with PHP has some tricky issues with scaling. An alternative would be a SaaS solution, such as WebSync On-Demand. (Disclaimer: I work there). That way you don't have to worry about any of the behind the scenes stuff, and you can just get your server-push functionality.

answered Jan 10 '10 at 16:35

Jerod Venema

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Not with the On-Demand version - it's SaaS, so it'll work with whatever you're using. For example, I do some of my tests on my personal page, which is running Apache (http://jerodandangela.com/fm-xd.htm) – Jerod Venema Jan 11 '10 at 16:27

score 1 · Answer 2 · answered Dec 01 '09 at 22:22

1

There are a couple of very good examples at: How to implement comet with PHP

answered Dec 01 '09 at 22:22

ConsultUtah

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score 0 · Answer 3 · answered Dec 01 '09 at 22:15

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Most of the services use the Client-initiated requests, but there's also Comet. There's a few articles out there on it.

answered Dec 01 '09 at 22:15

Agent_9191

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How to implement Server push / long polling / comet using PHP and Javascript

3 Answers3

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