Creating s simple client/server UDP example in PHP

Question

I'm trying to make a simple UDP client server example in PHP but I face an error.

This is the client :

$fp = stream_socket_client("udp://192.168.0.12:12478", $errno, $errstr);

if ($fp)
{
        fwrite($fp, "TEST 1 TEST 2 TEST 3");
        $buf = fgets($fp);
        var_dump($buf);
        fclose($fp);
}

This is the server :

$socket = stream_socket_server("udp://192.168.0.12:12478", $errno, $errstr, STREAM_SERVER_BIND);
if ($socket)
{
  while ($conn = stream_socket_accept($socket)) {
    fwrite($conn, date("D M j H:i:s Y\r\n"));
    fclose($conn);
  }
  fclose($socket);
}

All executions end with :

Warning: stream_socket_accept(): accept failed: Operation not supported 

Basically, this is the example given in all PHP documentations but I can't figure what is wrong in it. Any help is greatly appreciated.

Thanks.

Solution

Here is the warning on the very same page

Warning
This function should not be used with UDP server sockets. Instead, use stream_socket_recvfrom() and stream_socket_sendto().