问题
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?
回答1:
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.
回答2:
There are a couple of very good examples at: How to implement comet with PHP
回答3:
Most of the services use the Client-initiated requests, but there's also Comet. There's a few articles out there on it.
来源：https://stackoverflow.com/questions/1829257/how-to-implement-server-push-long-polling-comet-using-php-and-javascript