Open pop-up at remote pc in php

问题

First , I explain you Flow .

I have UserX,who is online at X country and UserY,who is online at Y-country.
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what i want :

When UserX click on ajax button.Popup is open at UserY's PC.
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Condition :

I dont want to set timeout ajax request ,because of this,server become slow.
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It is possible.

If you have any idea about it.

Thanks in advance.

回答1:

Consider using Comets, here is some example

来源：https://stackoverflow.com/questions/7007160/open-pop-up-at-remote-pc-in-php