$host = 'localhost';  //where is the websocket server 
    $port = 8047;
    $local = "https://www.domain.ru"; //url where this script run
       
    $key=base64_encode(uniqid());
    
    $data = '{"test":"test1", "server_id":"'.$key.'"}';  //data to be send 
    
    echo '<br><br>'.strlen($data).'<br><br>';  
    
    $head = "GET / HTTP/1.1"."\r\n".
            "Upgrade: WebSocket"."\r\n".
            "Connection: Upgrade"."\r\n".
            "Origin: $local"."\r\n".
            "Host: $host"."\r\n".
            "Sec-WebSocket-Key: $key\r\n".
            "Sec-WebSocket-Version: 13\r\n".
            "Content-Length: ".strlen($data)."\r\n"."\r\n";
            
            
    //WebSocket handshake
    $sock = fsockopen($host, $port, $errno, $errstr, 10); 
    fwrite($sock, $head ) or die('error:'.$errno.':'.$errstr);
    $headers = fread($sock, 2000);
    echo $headers;
    fwrite($sock, hybi10Encode($data)) or die('error:'.$errno.':'.$errstr);
    $wsdata = fread($sock, 2000);
    var_dump(hybi10Decode($wsdata));
    fclose($sock);