when a user send a message with chat on Google and Facebook, the message send immediately and when a user log off or log on show to his friends.
how immediately do it? is that Ajax or something like that?
I am working with PHP
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its Ajax only .it will call function repeatedly according to our time settings in that Ajax will work – sasi kanth Jun 17 '14 at 05:37
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@sasikanth but I dont think so! – miosian Jun 17 '14 at 05:44
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no actually that is the only one solution for that.... – sasi kanth Jun 17 '14 at 05:48
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@sasikanth It is a long time that I am working with Ajax and I think Ajax can't call immediately, the server can't support it, and it is very slow. and when i see that with firebug there are ajax sent show in console – miosian Jun 17 '14 at 05:53
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take a look at this may be you can get an idea http://www.codeproject.com/Articles/662841/Simple-PHP-Chat-Script – sasi kanth Jun 17 '14 at 05:54
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Have a look at http://www.socket.io – Tobi Jun 17 '14 at 07:19
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@sasikanth see this http://stackoverflow.com/questions/1086380/how-does-facebook-gmail-send-the-real-time-notification – Mohammad Kermani Jun 23 '14 at 08:11