Как различать клиентов на сервере?

$conn->httpRequest->getUri()->getQuery()

$this->clients[$user_id] = $conn;

$options = json_decode($msg, true);
 
$clients = array_intersect_key($this->clients, array_flip($options['users_id']));
 
foreach ($clients as $client) {
    $client->send($options['message']);
}

protected $clients;
protected $RoomSession;
public function __construct(){
    $this->clients = new \SplObjectStorage;
    }
public function onOpen(ConnectionInterface $conn) {
    $this->clients->attach($conn);
    $this->RoomSession = "";
    $a = explode("=", $conn->httpRequest->getUri()->getQuery());
    $this->RoomSession = $a[1];
    if($this->RoomSession == ""){ $conn->close(); }else{ echo "Connected session => ".$this->RoomSession; }
    }

public function onMessage(ConnectionInterface $from, $msg) {
    $numRecv = count($this->clients) - 1;
    foreach($this->clients as $client) {
        if ($from !== $client) {
            $client->send($msg);
            }
        }
    }

$this->RoomSession = $a[1];

protected $clients;
 
public function __construct()
{
    $this->clients = [];
}
 
public function onOpen(ConnectionInterface $conn) {
    $room_id = $this->getRoomId($conn);
    
    $this->clients[$room_id][] = $conn;
}
 
public function onMessage(ConnectionInterface $from, $msg) {
    $room_id = $this->getRoomId($from);
    
    foreach($this->clients[$room_id] as $client) {
        if ($from !== $client) {
            $client->send($msg);
        }
    }
 
private function getRoomId(ConnectionInterface $conn)
{
    parse_str(
        $conn->httpRequest->getUri()->getQuery(),
        $parameters
    );
    
    return $parameters['RoomSession'];
}