<?php
error_reporting(E_ALL);

/* Allow the script to hang around waiting for connections. */
set_time_limit(0);

/* Turn on implicit output flushing so we see what we're getting
 * as it comes in. */
ob_implicit_flush();

$address = 'localhost';
$port = 10000;

if (($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
    echo"socket_create() failed: reason:" . socket_strerror(socket_last_error()) ."\
";
}

if (socket_bind($sock, $address, $port) === false) {
    echo"socket_bind() failed: reason:" . socket_strerror(socket_last_error($sock)) ."\
";
}

if (socket_listen($sock, 5) === false) {
    echo"socket_listen() failed: reason:" . socket_strerror(socket_last_error($sock)) ."\
";
}

do {
    if (($msgsock = socket_accept($sock)) === false) {
        echo"socket_accept() failed: reason:" . socket_strerror(socket_last_error($sock)) ."\
";
        break;
    }
do {
    $out = socket_read($msgsock, 2048);

    if (!empty($out)) {
        if ($out == 'quit') {
            break;
        }
        elseif ($out == 'shutdown') {
            socket_write($msgsock, 'plc down', 8);
            socket_close($msgsock);
            break 2;
        }
        else {
            switch ($out) {
                case"KABBE": $response ="Kabbe te!"; break;
                case"SZOPJ": $response ="Szopjal te!"; break;
                default: $response ="Ismeretlen parancs";
            }
            socket_write($msgsock, $response, strlen($response));
            break;
        }
    }
    } while (true);
socket_close($msgsock);
} while (true);

socket_close($sock);
?>

Warning: socket_bind() [function.socket-bind]: unable to bind address [0]: Only one usage of each socket address (protocol/network address/port) is normally permitted. in C:\\wamp\\www\\socket\\socket.php on line 18
socket_bind() failed: reason: Only one usage of each socket address (protocol/network address/port) is normally permitted.
Warning: socket_listen() [function.socket-listen]: unable to listen on socket [0]: An invalid argument was supplied. in C:\\wamp\\www\\socket\\socket.php on line 22
socket_listen() failed: reason: An invalid argument was supplied.
Warning: socket_accept() [function.socket-accept]: unable to accept incoming connection [0]: An invalid argument was supplied. in C:\\wamp\\www\\socket\\socket.php on line 27
socket_accept() failed: reason: An invalid argument was supplied.

$socket = stream_socket_server("tcp://localhost:8000", $errno, $errstr);
if (!$socket) {
  echo"$errstr ($errno)<br />\
";
} else {
  while ($conn = stream_socket_accept($socket)) {
    fwrite($conn, 'The local time is ' . date('n/j/Y g:i a') ."\
");
    fclose($conn);
  }
  fclose($socket);
}

if (!socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1)) {
    echo socket_strerror(socket_last_error($socket));
    exit;
}

netstat -an

netstat -ban