Test\Helper::submitTrRequest PHP Method

    public static function submitTrRequest($url, $regularParams, $trData)
    {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, false);
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'POST');
        curl_setopt($curl, CURLOPT_HEADER, true);
        // curl_setopt($curl, CURLOPT_VERBOSE, true);
        curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query(array_merge($regularParams, ['tr_data' => $trData])));
        curl_setopt($curl, CURLOPT_HTTPHEADER, ['Content-Type: application/x-www-form-urlencoded']);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        $response = curl_exec($curl);
        curl_close($curl);
        preg_match('/Location: .*\\?(.*)/i', $response, $match);
        return trim($match[1]);
    }

 public function testUpdateCreditCardFromTransparentRedirect()
 {
     $customer = Braintree\Customer::create(array('firstName' => 'Mike', 'lastName' => 'Jonez'))->customer;
     $creditCard = Braintree\CreditCard::create(array('customerId' => $customer->id, 'number' => Braintree\Test\CreditCardNumbers::$masterCard, 'expirationMonth' => '10', 'expirationYear' => '10'))->creditCard;
     $params = array('credit_card' => array('number' => Braintree\Test\CreditCardNumbers::$visa));
     $trParams = array('paymentMethodToken' => $creditCard->token, 'creditCard' => array('expirationMonth' => '11', 'expirationYear' => '11'));
     $trData = Braintree\TransparentRedirect::updateCreditCardData(array_merge($trParams, array("redirectUrl" => "http://www.example.com")));
     $queryString = Test\Helper::submitTrRequest(Braintree\TransparentRedirect::url(), $params, $trData);
     Braintree\TransparentRedirect::confirm($queryString);
     $creditCard = Braintree\CreditCard::find($creditCard->token);
     $this->assertequals('401288', $creditCard->bin);
     $this->assertequals('1881', $creditCard->last4);
     $this->assertequals('11/2011', $creditCard->expirationDate);
 }