How to get a list of players on the RUST game server?

Question

PHP

I want my site to display a list of players on several servers (2-3 mine and several partner servers).
I monitor servers like this:

$socket = @fsockopen("udp://".$ip, $queryport , $errno, $errstr, 1);

stream_set_timeout($socket, 1);
stream_set_blocking($socket, TRUE);
fwrite($socket, "\xFF\xFF\xFF\xFF\x54Source Engine Query\x00");
$response = fread($socket, 4096);
@fclose($socket);

$packet = explode("\x00", substr($response, 6), 5);
$server = array();

echo "<pre>";
var_dump($packet);
echo "</pre>";

$server['name'] = $packet[0];
$server['map'] = $packet[1];
$server['game'] = $packet[2];
$server['description'] = $packet[3];
$inner = $packet[4];
$server['players']     = ord(substr($inner, 2, 1));
$server['playersmax']  = ord(substr($inner, 3, 1));
$server['password']    = ord(substr($inner, 7, 1));
$server['vac']         = ord(substr($inner, 8, 1));

It works flawlessly, but the trouble is that the server does not give more information.
1) Is it possible to contact him somehow differently?
fwrite($socket, "тут другое");
2) Or is there another way to get the list of players? (necessarily without rcon)
I did not find ANY documentation. I searched for a long time before posting here.
So if anyone knows, please tell me.
PS YES! You can get a list of players! 100% infa. I have seen it on websites more than once. For example, on monitoring (not advertising) ( tab "players on the server" gamemonitoring.net/server/109.95.212.40:28015 )
PSS RUST - I mean the game and not the programming language