Web APIコントローラーに次のWebメソッドがあります
    public HttpResponseMessage PostMakeBooking(FacilityBookingRequest bookingRequest)
    {
        var returnStatus = HttpStatusCode.OK;
        var json = new JavaScriptSerializer().Serialize(bookingRequest);
        var response = Request.CreateResponse<CardholderResponse>(returnStatus, cardholderResponse);
        return response;
    }
.NET アプリからこの呼び出しを行うと、シリアル化すると json 文字列が正しく表示されます
{"correlationId":null,"RequestId":"7ec5092a-342a-4e32-9311-10e7df3e3683","BookingId":"BK-123102","CardholderId":"123456","BookingFrom":"\/Date(1370512706448)\/","BookingUntil":"\/Date(1370523506449)\/","DeviceId":"ACU-01-R2","Action":"Add","LoginId":"tester","Password":"tester"}
ただし、phpスクリプトから呼び出すようにしたとき
public function web_request(){
    $guid   =self::getGUID();
    $replace = array("{","}");
    $guid  = str_replace($replace, "", $guid);
    $client = new Zend_Rest_Client("http://203.92.72.221");
    $request= new myZendCommon_FacilityBookingRequest();
    $request->RequestId         =$guid;
    $request->BookingFrom       ="27/03/2013 05:30";
    $request->BookingUntil      ="27/03/2013 06:30";
    $request->CardholderId      ="E0185963";
    $request->DeviceId          ="ACU-B2-01-R1";
    $request->BookingId         ="111";
    $request->Action            ="Add";
    $request->LoginId           ="tester";
    $request->correlationId     ="(null)";
    $request->Password          ="tester";
    $request = json_encode($request);
    $response = $client->restPost("/ibsswebapi/api/facilitybooking",$request);
    print_r($response);
    exit();
呼び出しは私の Web メソッドに送られますが、次を使用してシリアル化するとJavaScriptSerializer().Serialize(bookingRequest)
{"correlationId":null,"RequestId":null,"BookingId":null,"CardholderId":null,"BookingFrom":"\/Date(-62135596800000)\/","BookingUntil":"\/Date(-62135596800000)\/","DeviceId":null,"Action":null,"LoginId":null,"Password":null}
すべての値がヌルです。
スクリプトに何か問題がありますか?