sockets - Which technology is the best to inform clients about server events immediately? -

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I'm about to make a game first, it will be a browser game, later it will be an APP (Android, iPhone game).

On the server side I use Engex, Apache, PPP.

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I would like to inform online players about various incidents, for example: one user other I am attacking him should inform me about it immediately.

Classic AJAX can not be wrong there I have read something about comets, web sockets and some other technologies but I still can not understand what is the best solution for me? Please, help me decide.

WebSocket should be the preferred option. This is a widely supported technique.

This is a continuous, full duplex connection, which is compatible with all major browsers


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