<?php
$ean = "9789084999936";
//Create the client object
$soapclient = new SoapClient('https://testservices.cb.nl/soap/api/v1/DigitalProductOrderService/DigitalProductOrderService?wsdl');
$userNameHdr = new SoapHeader('cb.services.soap', 'UserName', '_SNIP_', false);
$passwordHdr = new SoapHeader('cb.services.soap', 'Password', '_SNIP_', false);
$soapclient->__setSoapHeaders(array($userNameHdr, $passwordHdr));
$params = array();
$params[] = new SoapVar($ean, XSD_STRING, null, null, 'EAN');
$params[] = new SoapVar("CBW", XSD_STRING, null, null, 'DeliveryChannel');
$Arg2 = new SoapVar($params, SOAP_ENC_OBJECT, null, null, 'arg2');
$response = $soapclient->checkOrderable($Arg2);
echo 'SOAP';
echo '<br><br>EAN: ' . $ean.'<br />';
echo 'Available: ' .  $response->Orderable->orderable .'<br />'; 

 <?php
 $ean = "9789084999936";
   $orderreference = 'b5'; // iedere keer een unieke kode opgeven
   $username = "_SNAP";
   $password = "_SNAP_";
   //Create the client object
   $soapclient = new SoapClient('https://testservices.cb.nl/soap/api/v1/DigitalProductOrderService/DigitalProductOrderService?wsdl'
     );
       
   $userNameHdr = new SoapHeader('cb.services.soap', 'UserName', $username, false);
   $passwordHdr = new SoapHeader('cb.services.soap', 'Password', $password, false);
   $soapclient->__setSoapHeaders(array($userNameHdr, $passwordHdr));
   $params = array();
   $params[] = new SoapVar($ean, XSD_STRING, null, null, 'EAN');
   $params[] = new SoapVar("CBW", XSD_STRING, null, null, 'DeliveryChannel');
   $params[] = new SoapVar($orderreference, XSD_STRING, null, null, 'OrderReference');
   $Arg2 = new SoapVar($params, SOAP_ENC_OBJECT, null, null, 'arg2');
   $response = $soapclient->placeOrder($Arg2);
    
   echo 'EAN: ' . $ean.'<br />';
   echo 'URL: ' .  $response->placeOrder->OrderedItem->URL .'<br />';
   echo 'CbOrderReference: ' .  $response->placeOrder->CbOrderReference .'<br />';
   echo 'EAN: ' .  $response->placeOrder->OrderedItem->EAN .'<br />';

using System;
using System.Net;
using System.Web.Script.Serialization;
namespace CheckOrderable
{
    class Program
    {
        static void Main(string[] args)
        {
            var ean = "9789084999936";
            string result = getCheckOrderable(ean);
            var objectResult = new JavaScriptSerializer().DeserializeObject(result);
             
            Console.Write(result);
            Console.WriteLine(); Console.WriteLine();
            Console.WriteLine("Press a key to exit");
            Console.ReadKey();
        }
        public static string getCheckOrderable(string ean)
        {
            var webclient = new WebClient();
            webclient.Headers.Add("Accept", "application/json");
            webclient.Headers.Add("Content-Type", "application/json");
            webclient.Headers.Add("UserName", "_SNIP_");
            webclient.Headers.Add("Password", "_SNIP_");
            var url = "https://testservices.cb.nl/rest/api/v1/DigitalProductOrderService/checkOrderable";
            var data = new JavaScriptSerializer().Serialize(new { EAN = ean, DeliveryChannel = "CBW" });
            var response = webclient.UploadString(url, data);
            return response;
        }
    }
}