Disable Shipping details option in PayPal Checkout - paypal

Question

I am using PayPal Checkout in my website using the PayPal Integration Wizard
and I want to disable the shipping details. What changes should I make in which file?
Updated
This is my expresscheckout file and I have posted a portion from the paypalfunctions.php as well.
expresscheckout.php
<?php
require_once ("paypalfunctions.php");
$_SESSION["Payment_Amount"] = $_POST["Payment_Amount"];
// ==================================
// PayPal Express Checkout Module
// ==================================
//'------------------------------------
//' The paymentAmount is the total value of
//' the shopping cart, that was set
//' earlier in a session variable
//' by the shopping cart page
//'------------------------------------
$paymentAmount = $_SESSION["Payment_Amount"];
//'------------------------------------
//' The currencyCodeType and paymentType
//' are set to the selections made on the Integration Assistant
//'------------------------------------
$currencyCodeType = "USD";
$paymentType = "Sale";
//'------------------------------------
//' The returnURL is the location where buyers return to when a
//' payment has been succesfully authorized.
//'
//' This is set to the value entered on the Integration Assistant
//'------------------------------------
$returnURL = "http://localhost/Reg/Components/PayPal/billinghandler.php";
//'------------------------------------
//' The cancelURL is the location buyers are sent to when they hit the
//' cancel button during authorization of payment during the PayPal flow
//'
//' This is set to the value entered on the Integration Assistant
//'------------------------------------
$cancelURL = "http://localhost/Reg/Portal/SecretaryProfile.php";
//'------------------------------------
//' Calls the SetExpressCheckout API call
//'
//' The CallShortcutExpressCheckout function is defined in the file PayPalFunctions.php,
//' it is included at the top of this file.
//'-------------------------------------------------
$resArray = CallShortcutExpressCheckout ($paymentAmount, $currencyCodeType, $paymentType, $returnURL, $cancelURL);
$ack = strtoupper($resArray["ACK"]);
if($ack=="SUCCESS" || $ack=="SUCCESSWITHWARNING")
{
RedirectToPayPal ( $resArray["TOKEN"] );
}
else
{
//Display a user friendly Error on the page using any of the following error information returned by PayPal
$ErrorCode = urldecode($resArray["L_ERRORCODE0"]);
$ErrorShortMsg = urldecode($resArray["L_SHORTMESSAGE0"]);
$ErrorLongMsg = urldecode($resArray["L_LONGMESSAGE0"]);
$ErrorSeverityCode = urldecode($resArray["L_SEVERITYCODE0"]);
echo "SetExpressCheckout API call failed. ";
echo "Detailed Error Message: " . $ErrorLongMsg;
echo "Short Error Message: " . $ErrorShortMsg;
echo "Error Code: " . $ErrorCode;
echo "Error Severity Code: " . $ErrorSeverityCode;
}
?>
a portion from paypalfunctions.php
function hash_call($methodName,$nvpStr)
{
//declaring of global variables
global $API_Endpoint, $version, $API_UserName, $API_Password, $API_Signature;
global $USE_PROXY, $PROXY_HOST, $PROXY_PORT;
global $gv_ApiErrorURL;
global $sBNCode;
//setting the curl parameters.
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$API_Endpoint);
curl_setopt($ch, CURLOPT_VERBOSE, 1);
//turning off the server and peer verification(TrustManager Concept).
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_POST, 1);
//if USE_PROXY constant set to TRUE in Constants.php, then only proxy will be enabled.
//Set proxy name to PROXY_HOST and port number to PROXY_PORT in constants.php
if($USE_PROXY)
curl_setopt ($ch, CURLOPT_PROXY, $PROXY_HOST. ":" . $PROXY_PORT);
//NVPRequest for submitting to server
$nvpreq="METHOD=" . urlencode($methodName) . "&VERSION=" . urlencode($version) . "&PWD=" . urlencode($API_Password) . "&USER=" . urlencode($API_UserName) . "&SIGNATURE=" . urlencode($API_Signature) . $nvpStr . "&BUTTONSOURCE=" . urlencode($sBNCode);
//setting the nvpreq as POST FIELD to curl
curl_setopt($ch, CURLOPT_POSTFIELDS, $nvpreq);
//getting response from server
$response = curl_exec($ch);
//convrting NVPResponse to an Associative Array
$nvpResArray=deformatNVP($response);
$nvpReqArray=deformatNVP($nvpreq);
$_SESSION['nvpReqArray']=$nvpReqArray;
if (curl_errno($ch))
{
// moving to display page to display curl errors
$_SESSION['curl_error_no']=curl_errno($ch) ;
$_SESSION['curl_error_msg']=curl_error($ch);
//Execute the Error handling module to display errors.
}
else
{
//closing the curl
curl_close($ch);
}
return $nvpResArray;
}

Answer 1

Solved. In the hash_call function in the paypalfunctions.php file, the NVPRequest for submitting to server should be updated with passing NOSHIPPING=1 as a parameter as below.
//NVPRequest for submitting to server
$nvpreq="METHOD=" . urlencode($methodName) ."&NOSHIPPING=1" . "&VERSION=" . urlencode($version) . "&PWD=" . urlencode($API_Password) . "&USER=" . urlencode($API_UserName) . "&SIGNATURE=" . urlencode($API_Signature) . $nvpStr . "&BUTTONSOURCE=" . urlencode($sBNCode);