<?php
$serv = stream_socket_server("tcp://0.0.0.0:8000", $errno, $errstr)
    or die("create server failed");

for($i=0; $i < 32; $i ++) {
    if (pcntl_fork() == 0 ) {
        while(1) {
            $conn = stream_socket_accept($serv);
            if ($conn == false) continue;
            $request = fread($conn);//do some thing
            //$response = “hello world”;
            fwrite($response);
            fclose($conn);
        }
        exit(0);
    }
}