<?php
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_bind($socket, "0.0.0.0", 9501);
socket_listen($socket, 5);
for(;;) {
    $client = socket_accept($socket);
    $buffer = socket_read($client, 2048);
 
    socket_write($client, "HTTP/1.1 200 OK\r\n");
    socket_write($client, "Transfer-Encoding: chunked\r\n");
    socket_write($client, "\r\n");
    socket_write($client, "HelloWorld\r\n");
    socket_close($client);
}
socket_close($socket);