I need to know how COMET works [closed]

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i want to implement comet in php... i have idea about how ajax works but i tried to study about long polling server push using comet but i am facing problem to figure out how it works. so can you please help me...

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there are few techniques to implement the comet concept. you may look at Tornado (which is has a great implementation in python) or at phomet which is a PHP implementation. Surely this should be your starting point

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You might find this google hit (How to implement COMET with PHP) interesting.