HTTP protocol Implementation Chat

Reverse Ajax: Refers to the server actively push the data information to the client

+ajax polling implementation via long connection +ob cache

Table Data sql

Let's start with a piece of code to understand the principle:

//Inverse ajax principle (ob cache +http long connections)    Ob_start(); Echo str_repeat(' ', 4096)    Ob_end_flush(); Ob_flush(); $i= 1;  while(true){        Echo $i++; Ob_flush(); Flush(); Sleep(1);//send data once per second}

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HTTP protocol Implementation Chat