сбербанк payment

<?php

  error_reporting(E_ALL);
  header("Content-Type: text/html; charset=utf-8");

  $username = 'логин';
  $password = 'пароль';

    $rub = 643;
    $ammount = 100;

  $returnUrl = "success.html";

    $API_URI = 'https://securepayments.sberbank.ru/payment/rest/';
    $API_URI_TEST = 'https://3dsec.sberbank.ru/payment/rest/';

  $orderId = 'GTE567';

  $request = $API_URI_TEST.'/register.do?amount='.$ammount.'&currency='.$rub.'&language=ru&orderNumber='.$orderId.'&password='.$password.'&returnUrl='.$returnUrl.'userName='.$username.'&pageView=DESKTOP&merchantLogin=merch_child';


    $response = file_get_contents($request);
    $res = json_decode($response);

    echo "<pre>";
    print_r($res);
    echo "</pre>";