PHP SOAP对象引用未设置为对象的引用

Question

我正在尝试与SOAP服务进行通信，以便将一些数据发布到数据库中。

Here's the WSDL.

正如您所看到的，所需数据非常繁琐，因此对代码长度表示道歉，您需要滚动查看所有内容。以下是我尝试与服务进行通信的方式，但是我收到错误System.NullReferenceException: Object reference not set to an instance of an object

PHP：

$soapClient = new soapClient("https://secure.quickflora.com/Admin/scripts/ws/QuickfloraOrders.asmx?WSDL");


    $orderArray = array(
        "Token" => $token,
        "OrderErrorEmail" => "edwardsalexk@gmail.com",
        "Billing" => array("CustomerID" => "1",
            "FullName" => "Jack Nichols",
            "FirstName" => "Jack",
            "LastName" => "Nichols",
            "Address1" => "9725 E Windrose Drive",
            "Address2" => "",
            "Address3" => "",
            "City" => "Scottsdale",
            "State" => "Arizona",
            "Zip" => "85260",
            "Phone"=> "4807218374",
            "PhoneExt" => "123",
            "Fax" => "1234",
            "Email"=> "edwardsalexk@gmail.com",
            "Cell" =>"480 721 8374",
            ),
        "Shipping" => array("Attention "=> "Alexander",
            "Salutation" => "Alexander",
            "FirstName" => "Alexander",
            "LastName" => "Edwards",
            "Address1"=> "9725 E Windrose Drive",
            "Address2" => "",
            "Address3" => "",
             "City"=>"Scottsdale",
             "State" =>"Arizona",
             "Zip" => "85260",
             "Country" => "United States",
             "Phone" => "480 721 8374",
             "PhoneExt" => "123",
             "Fax" => "123",
             "Email" => "edwardsalexk@gmail.com",
             "Cell" => "480 721 8374",
             "CardMessage" => "I hope these flowers find you well!",
             "DestinationType" => "House",
             "DriverRouteInfo" => "None",
             "Priority" => "Highest",
             "Order Ship Date" => "4/20/2017",
             ),
        "Payment" => array("MethodID" => "1",
            "Check" =>array("Number" => "123",
                "CheckID" => "1",
                "ChkDate" => "4/20/2017,"),
            "CreditCard" => array("TypeID" => "1",
                "Name" => "Alexander Edwards",
                "Account Number" => "12345678",
                "Expiration Date" => "11/14/1993",
                "SecurityCode" => "123",
                "ApprovalCode" => "123")),
        "WireServiceInfo" => array("WireService" => "Alexander Service",
            "WireServiceCode" => "123",
            "ReferenceID" => "123",
            "TransmitMethod" => "123",
            "RepresentativeTalkedTo" => "Alexander",
            "FloristName" => "Alexander",
            "FloristPhone" => "480 721 8734",
            "FloristCity" => "Scottsdale",
            "FloristState" => "Arizona"),
        "Orderdetails" => array("OccasionCodeID" => "123",
            "SourceCodeID" => "123",
            "Comments" => "Hello",
            "TaxGroupID" => "123",
            "Currency" => array("ID" => "123",
                "ExchangeRate" => 1.2),
            "DeliveryCharge" => 12.5,
            "ServiceCharge" => 12.5,
            "Discounts" => array("Percentage" => 12.5,
                "Amount" => 12.5),
            "Tax" => array("Percentage" => 12.5,
                "Amount" => 12.5),
            "GSTTax" => array("Percentage" => 12.5,
                "Amount" => 12.5),
            "PSTTax" => array("Percentage" => 12.5,
                "Amount" => 12.5),
            "Total" => 123.34 
            ),
        "OrderItemsdetails" => array(
            "Itemno" => array("String", "String"),
            "Itemid" => array("String", "String"),
            "UpcCode" => array("String", "String"),
            "ItemName" => array("String", "String"),
            "Description" => array("String", "String"),
            "Quantity" => array("String", "String"),
            "UnitOfMeasurement" => array("String", "String"),
            "DiscountPercentage" => array("String", "String"),
            "UnitPrice" => array("String", "String")
            )
        );


    $response = $soapClient->PostOrder($orderArray);
    echo var_dump($response);