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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?

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3 Answers

up vote 2 down vote

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.

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Needs a MicroSoft server? – Upper Stage Jan 10 at 16:39
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 (jerodandangela.com/fm-xd.htm) – jvenema Jan 11 at 16:27
up vote 1 down vote

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

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up vote 0 down vote

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

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