NVP Problem

kool_samule · August 24, 2010

Hi Chaps,

I'm integrating my app with PayPal WebPaymentsPro and at the ExpressCheckout part.

I've contructed a parameter in NVP format:

$nvpstr="&ADDRESSOVERRIDE=1$shiptoAddress&".$joined_nvp."&MAXAMT=".(string)$maxamt."&AMT=".(string)$amt."&ITEMAMT=".(string)$itemamt."&CALLBACKTIMEOUT=4&".$joined_nvp_ship."&INSURANCEAMT=0.00&INSURANCEOPTIONOFFERED=false&CALLBACK=https://www.ppcallback.com/callback.pl&SHIPPINGAMT=".$CALC_SHIP."&SHIPDISCAMT=0.00&TAXAMT=0.00&ReturnUrl=".$returnURL."&CANCELURL=".$cancelURL ."&CURRENCYCODE=".$currencyCodeType."&PAYMENTACTION=".$paymentType;

This, as an example, echo's:

&ADDRESSOVERRIDE=1&SHIPTONAME=Name&SHIPTOSTREET=&SHIPTOCITY=&SHIPTOSTATE=&SHIPTOCOUNTRYCODE=GB&SHIPTOZIP=&L_NAME0=ITEM!&L_NUMBER0=40&L_DESC0=S&L_QTY0=1&L_AMT0=22.50&L_NAME1=ITEM2&L_NUMBER1=186&L_DESC1=S/M&L_QTY1=1&L_AMT1=14.00&L_NAME2=ITEM3&L_NUMBER2=105&L_DESC2=8&L_QTY2=1&L_AMT2=23.00&MAXAMT=66.5&AMT=59.5&ITEMAMT=59.5&CALLBACKTIMEOUT=4&L_SHIPPINGOPTIONLABEL0=UK - Free Delivery (UK orders over £50)&L_SHIPPINGOPTIONNAME0=UK - Free Delivery (UK orders over £50)&L_SHIPPINGOPTIONAMOUNT0=0&L_SHIPPINGOPTIONISDEFAULT0=true&L_SHIPPINGOPTIONLABEL1=UK-Recorded Delivery - £3.00 (plus 50p charge per extra item)&L_SHIPPINGOPTIONNAME1=UK-Recorded Delivery - £3.00 (plus 50p charge per extra item)&L_SHIPPINGOPTIONAMOUNT1=4&L_SHIPPINGOPTIONISDEFAULT1=false&L_SHIPPINGOPTIONLABEL2=UK-Special Next Day Delivery - £6.00 (plus 50p charge per extra item)&L_SHIPPINGOPTIONNAME2=UK-Special Next Day Delivery - £6.00 (plus 50p charge per extra item)&L_SHIPPINGOPTIONAMOUNT2=7&L_SHIPPINGOPTIONISDEFAULT2=false&INSURANCEAMT=0.00&INSURANCEOPTIONOFFERED=false&CALLBACK=https://www.ppcallback.com/callback.pl&SHIPPINGAMT=0&SHIPDISCAMT=0.00&TAXAMT=0.00&ReturnUrl=http%3A%2F%2Fwww.xxxxx.co.uk%3A80%2Fshop%2Fphp_nvp_samples%2FReviewOrder.php%3FcurrencyCodeType%3DGBP%26paymentType%3DSale&CANCELURL=http%3A%2F%2Fwww.xxxxx.co.uk%3A80%2Fshop%2Fphp_nvp_samples%2FSetExpressCheckout.php%3FpaymentType%3DSale&CURRENCYCODE=GBP&PAYMENTACTION=Sale

If I attempt to pass the parameter to PayPal, I get an error stating that the Flat-rate shipping options are missing.

However, if I echo the above code into a browser, then copy and paste in place of the variable parameter (so it is simply text):

$nvpstr="&ADDRESSOVERRIDE=1&SHIPTONAME=Name&SHIPTOSTREET=&SHIPTOCITY=&SHIPTOSTATE=&SHIPTOCOUNTRYCODE=GB&SHIPTOZIP=&L_NAME0=ITEM!&L_NUMBER0=40&L_DESC0=S&L_QTY0=1&L_AMT0=22.50&L_NAME1=ITEM2&L_NUMBER1=186&L_DESC1=S/M&L_QTY1=1&L_AMT1=14.00&L_NAME2=ITEM3&L_NUMBER2=105&L_DESC2=8&L_QTY2=1&L_AMT2=23.00&MAXAMT=66.5&AMT=59.5&ITEMAMT=59.5&CALLBACKTIMEOUT=4&L_SHIPPINGOPTIONLABEL0=UK - Free Delivery (UK orders over £50)&L_SHIPPINGOPTIONNAME0=UK - Free Delivery (UK orders over £50)&L_SHIPPINGOPTIONAMOUNT0=0&L_SHIPPINGOPTIONISDEFAULT0=true&L_SHIPPINGOPTIONLABEL1=UK-Recorded Delivery - £3.00 (plus 50p charge per extra item)&L_SHIPPINGOPTIONNAME1=UK-Recorded Delivery - £3.00 (plus 50p charge per extra item)&L_SHIPPINGOPTIONAMOUNT1=4&L_SHIPPINGOPTIONISDEFAULT1=false&L_SHIPPINGOPTIONLABEL2=UK-Special Next Day Delivery - £6.00 (plus 50p charge per extra item)&L_SHIPPINGOPTIONNAME2=UK-Special Next Day Delivery - £6.00 (plus 50p charge per extra item)&L_SHIPPINGOPTIONAMOUNT2=7&L_SHIPPINGOPTIONISDEFAULT2=false&INSURANCEAMT=0.00&INSURANCEOPTIONOFFERED=false&CALLBACK=https://www.ppcallback.com/callback.pl&SHIPPINGAMT=0&SHIPDISCAMT=0.00&TAXAMT=0.00&ReturnUrl=http%3A%2F%2Fwww.xxxxx.co.uk%3A80%2Fshop%2Fphp_nvp_samples%2FReviewOrder.php%3FcurrencyCodeType%3DGBP%26paymentType%3DSale&CANCELURL=http%3A%2F%2Fwww.xxxxx.co.uk%3A80%2Fshop%2Fphp_nvp_samples%2FSetExpressCheckout.php%3FpaymentType%3DSale&CURRENCYCODE=GBP&PAYMENTACTION=Sale"

This works, which has really stumped me.

How can a parameter made up of variables fail, but the same output in it's place does?

Is there something obvious that I am missing, because this is doing my brain in!

AbraCadaver · August 24, 2010

You probably need to urlencode() all of the variables.

schilly · August 24, 2010

Yes you need to URL encode anything for the PayPal WSPP API.

kool_samule · August 24, 2010

Hi

I have tried:

urlencode,

urldecode,

utf8_encode,

utf8_decode,

and none of them work.

When I echo my variables in $nvpstr , and then copy this, and replace the $nvpstr variables with a "string", it works fine.

I do not understand!

schilly · August 24, 2010

Whats the response array give you?

kool_samule · August 24, 2010

Hi,

this is the php that collects the form inputs from previous page, contructs the parameter and passes to payapl.

require_once 'CallerService.php';
require_once 'constants.php';

$API_UserName=API_USERNAME;

$API_Password=API_PASSWORD;

$API_Signature=API_SIGNATURE;

$API_Endpoint =API_ENDPOINT;

$subject = SUBJECT;

$token = $_REQUEST['token'];

$getAuthModeFromConstantFile = true;

$nvpHeader = "";

if(!$getAuthModeFromConstantFile) {
$AuthMode = "THIRDPARTY"; 
} else {
if(!empty($API_UserName) && !empty($API_Password) && !empty($API_Signature) && !empty($subject)) {
	$AuthMode = "THIRDPARTY";
}else if(!empty($API_UserName) && !empty($API_Password) && !empty($API_Signature)) {
	$AuthMode = "3TOKEN";
}else if(!empty($subject)) {
	$AuthMode = "FIRSTPARTY";
}
}
switch($AuthMode) {

case "3TOKEN" : 
		$nvpHeader = "&PWD=".urlencode($API_Password)."&USER=".urlencode($API_UserName)."&SIGNATURE=".urlencode($API_Signature);
		break;
case "FIRSTPARTY" :
		$nvpHeader = "&SUBJECT=".urlencode($subject);
		break;
case "THIRDPARTY" :
		$nvpHeader = "&PWD=".urlencode($API_Password)."&USER=".urlencode($API_UserName)."&SIGNATURE=".urlencode($API_Signature)."&SUBJECT=".urlencode($subject);
		break;		

}

if(! isset($token)) {

	   $serverName = $_SERVER['SERVER_NAME'];
	   $serverPort = $_SERVER['SERVER_PORT'];
	   $url=dirname('http://'.$serverName.':'.$serverPort.$_SERVER['REQUEST_URI']);


	   $currencyCodeType=$_REQUEST['currencyCodeType'];
	   $paymentType=$_REQUEST['paymentType'];
   

           $personName        = $_REQUEST['PERSONNAME'];
	   $SHIPTOSTREET      = $_REQUEST['SHIPTOSTREET'];
	   $SHIPTOCITY        = $_REQUEST['SHIPTOCITY'];
	   $SHIPTOSTATE	      = $_REQUEST['SHIPTOSTATE'];
	   $SHIPTOCOUNTRYCODE = $_REQUEST['SHIPTOCOUNTRYCODE'];
	   $SHIPTOZIP         = $_REQUEST['SHIPTOZIP'];
	   
	   $cartTotal = cartTotal();
	   
	   $items = $_REQUEST['different_items'];
	   

		$arr_items = array(); 
		$arr_items_cost = array(); 

		$i = 0; 

		do{
	        	$L_NAME = $_REQUEST['L_NAME'.$i]; 
		$L_NUMBER = $_REQUEST['L_NUMBER'.$i]; 
                	$L_DESC = $_REQUEST['L_DESC'.$i]; 
                	$L_QTY = $_REQUEST['L_QTY'.$i]; 
                	$L_AMT = $_REQUEST['L_AMT'.$i]; 
		$NVP = "L_NAME$i=$L_NAME&L_NUMBER$i=$L_NUMBER&L_DESC$i=$L_DESC&L_QTY$i=$L_QTY&L_AMT$i=$L_AMT";

                $arr_items[] = $NVP; 
                $arr_items_cost[] = $L_AMT; 

                $i++;

		}while ($i < $items); 

		$joined_nvp = join("&", $arr_items); 


		$shipping_post = utf8_decode($_REQUEST['shippingname']);

		$shipping_iso = $_REQUEST['SHIPTOCOUNTRYCODE'];

		mysql_select_db($database_dbconnect, $dbconnect);
		$query_rsPostage = "SELECT * FROM tbl_postage INNER JOIN tbl_countries ON tbl_countries.shipping_zone=tbl_postage.shipping_zone WHERE tbl_countries.iso='$shipping_iso' ORDER BY postagetitle ASC";
		$rsPostage = mysql_query($query_rsPostage, $dbconnect) or die(mysql_error());
		$row_rsPostage = mysql_fetch_assoc($rsPostage);
		$totalRows_rsPostage = mysql_num_rows($rsPostage);

		$quantity = NoItems();

		$arr_shipping = array(); 
		$arr_ship_cost = array(); 

		$pi = 0;

		do { 

			  	$L_SHIPPINGOPTIONLABEL = $row_rsPostage['shipping_zone'].'-'.$row_rsPostage['postagetitle'];
				$L_SHIPPINGOPTIONNAME = $row_rsPostage['shipping_zone'].'-'.$row_rsPostage['postagetitle'];
		  		if($quantity != 1){
					$surcharge_items = ($quantity-1);
					$surcharge_shipping = ($surcharge_items*$row_rsPostage['surcharge']);
					$L_SHIPPINGOPTIONAMOUNT = $row_rsPostage['postageprice']+$surcharge_shipping;	
				}
				else {
					$additional_shipping = 0;
					$L_SHIPPINGOPTIONAMOUNT = $row_rsPostage['postageprice'];
				}
				if($L_SHIPPINGOPTIONLABEL == $shipping_post){
					$L_SHIPPINGOPTIONISDEFAULT = "true";
					$NVP_SHIP_OPTION = "SHIPPINGAMT=$L_SHIPPINGOPTIONAMOUNT";
					$NVP_ARRAY_OPTION = "$L_SHIPPINGOPTIONAMOUNT";
					$CALC_SHIP = $L_SHIPPINGOPTIONAMOUNT;
				}
				else{
					$L_SHIPPINGOPTIONISDEFAULT = "false";
				}
		  		$NVP_SHIP = "L_SHIPPINGOPTIONLABEL$pi=$L_SHIPPINGOPTIONLABEL&L_SHIPPINGOPTIONNAME$pi=$L_SHIPPINGOPTIONNAME&L_SHIPPINGOPTIONAMOUNT$pi=$L_SHIPPINGOPTIONAMOUNT&L_SHIPPINGOPTIONISDEFAULT$pi=$L_SHIPPINGOPTIONISDEFAULT";

		  		$arr_shipping[] = $NVP_SHIP; 

				$arr_ship_cost['price'] = $L_SHIPPINGOPTIONAMOUNT; 
		  
		  		$pi++;


			} while ($row_rsPostage = mysql_fetch_assoc($rsPostage)); 


		$joined_nvp_ship = join("&", $arr_shipping); 


	   $returnURL =urlencode($url.'/ReviewOrder.php?currencyCodeType='.$currencyCodeType.'&paymentType='.$paymentType);
	   $cancelURL =urlencode("$url/SetExpressCheckout.php?paymentType=$paymentType" );
	   
    	   $itemamt = array_sum($arr_items_cost);
	   $items = number_format($itemamt, 2, '.', '');
	   $CALC_SHIP = number_format($CALC_SHIP, 2, '.', '');
	   $amt = $itemamt+$CALC_SHIP; 
	   $amt = number_format($amt, 2, '.', '');
	   $max_ship = max($arr_ship_cost);
	   
	   $maxamt= $itemamt+$max_ship;
	   $maxamt = number_format($maxamt, 2, '.', '');
	   
           $shiptoAddress = "&SHIPTONAME=$personName&SHIPTOSTREET=$SHIPTOSTREET&SHIPTOCITY=$SHIPTOCITY&SHIPTOSTATE=$SHIPTOSTATE&SHIPTOCOUNTRYCODE=$SHIPTOCOUNTRYCODE&SHIPTOZIP=$SHIPTOZIP";
	   
$nvpstr="&ADDRESSOVERRIDE=1$shiptoAddress&".$joined_nvp."&MAXAMT=".(string)$maxamt."&AMT=".(string)$amt."&ITEMAMT=".(string)$itemamt."&CALLBACKTIMEOUT=4&".$joined_nvp_ship."&INSURANCEAMT=0.00&INSURANCEOPTIONOFFERED=false&SHIPPINGAMT=".(string)$CALC_SHIP."&SHIPDISCAMT=0.00&TAXAMT=0.00&ReturnUrl=".$returnURL."&CANCELURL=".$cancelURL ."&CURRENCYCODE=".$currencyCodeType."&PAYMENTACTION=".$paymentType."&CALLBACK=https://www.ppcallback.com/callback.pl";


	   
   
	   
          $nvpstr = $nvpHeader.$nvpstr;
           
	   $resArray=hash_call("SetExpressCheckout",$nvpstr);
	   $_SESSION['reshash']=$resArray;

	   $ack = strtoupper($resArray["ACK"]);

	   if($ack=="SUCCESS"){
			$token = urldecode($resArray["TOKEN"]);
			$payPalURL = PAYPAL_URL.$token;
			header("Location: ".$payPalURL);
		} else  {
				$location = "APIError.php";
				header("Location: $location");
		}
} else {

	   $token =urlencode( $_REQUEST['token']);

	   $nvpstr="&TOKEN=".$token;

	   $nvpstr = $nvpHeader.$nvpstr;

	   $resArray=hash_call("GetExpressCheckoutDetails",$nvpstr);
	   $_SESSION['reshash']=$resArray;
	   $ack = strtoupper($resArray["ACK"]);

	   if($ack == 'SUCCESS' || $ack == 'SUCCESSWITHWARNING'){
				require_once "GetExpressCheckoutDetails.php";
		  } else  {
			$location = "APIError.php";
			header("Location: $location");
		  }
}
?>

Hope that is what you were on about, if not let me know and hopefully we can get it solved!

cheers

schilly · August 24, 2010

Nope. I'm wonder what is in $resArray because that has all the info that PayPal sends back about the API call. If there was an error, it will be in there.

kool_samule · August 25, 2010

Hi,

$nvpstr (without Header):

&ADDRESSOVERRIDE=1&SHIPTONAME=Name&SHIPTOSTREET=Street&SHIPTOCITY=City&SHIPTOSTATE=State&SHIPTOCOUNTRYCODE=GB&SHIPTOZIP=ZIP&ORDERTOTAL=15.00&ITEMAMT=12&SHIPPINGAMT=3.00&AMT=15.00&HANDLINGAMT=0.00&SHIPDISCAMT=0.00&TAXAMT=0.00&MAXAMT=18.00&L_NAME0=Tribal Flowers Scarf&L_NUMBER0=204&L_DESC0=One Size &L_QTY0=1&L_AMT0=12.00&L_SHIPPINGOPTIONLABEL0=UK-Free Of Charge&L_SHIPPINGOPTIONNAME0=UK-Free Of Charge&L_SHIPPINGOPTIONAMOUNT0=0.00&L_SHIPPINGOPTIONISDEFAULT0=false&L_SHIPPINGOPTIONLABEL1=UK-Introductory Offer - Free UK Delivery&L_SHIPPINGOPTIONNAME1=UK-Introductory Offer - Free UK Delivery&L_SHIPPINGOPTIONAMOUNT1=0.00&L_SHIPPINGOPTIONISDEFAULT1=false&L_SHIPPINGOPTIONLABEL2=UK-Recorded Delivery - £3.00 (plus 50p charge per extra item)&L_SHIPPINGOPTIONNAME2=UK-Recorded Delivery - £3.00 (plus 50p charge per extra item)&L_SHIPPINGOPTIONAMOUNT2=3.00&L_SHIPPINGOPTIONISDEFAULT2=true&L_SHIPPINGOPTIONLABEL3=UK-Special Next Day Delivery - £6.00 (plus 50p charge per extra item)&L_SHIPPINGOPTIONNAME3=UK-Special Next Day Delivery - £6.00 (plus 50p charge per extra item)&L_SHIPPINGOPTIONAMOUNT3=6.00&L_SHIPPINGOPTIONISDEFAULT3=false&CALLBACKTIMEOUT=4&ReturnUrl=http%3A%2F%2Fwww.xxxxx.co.uk%3A80%2Fshop%2Fphp_nvp_samples%2FReviewOrder.php%3FcurrencyCodeType%3DGBP%26paymentType%3DSale&CANCELURL=http%3A%2F%2Fwww.xxxxx.co.uk%3A80%2Fshop%2Fphp_nvp_samples%2FSetExpressCheckout.php%3FpaymentType%3DSale&CURRENCYCODE=GBP&PAYMENTACTION=Sale

$resArray:

Array ( [TIMESTAMP] => 2010-08-25T08:37:55Z [CORRELATIONID] => 1e91f230bd6a8 [ACK] => Failure [VERSION] => 64.0 [bUILD] => 1468257 [L_ERRORCODE0] => 10413 [L_SHORTMESSAGE0] => Transaction refused because of an invalid argument. See additional error messages for details. [L_LONGMESSAGE0] => The totals of the cart item amounts do not match order amounts. [L_SEVERITYCODE0] => Error )

Please note, the $nvpstr was made up of variable to produce the above. This resutls in failure (see $resArray). If I copy the value of $nvpstr, as it appears above, and send that as a string, it works.

schilly · August 25, 2010

Most of those variables you are using are deprecated as of v.63.

https://cms.paypal.com/us/cgi-bin/?&cmd=_render-content&content_ID=developer/e_howto_api_nvp_r_SetExpressCheckout

kool_samule · August 25, 2010

turns out it was a problem with the way i was contructing my parameter:

changed '&' to &,

and it worked fine!

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