paypal.lib.php

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<?php
/* Copyright (C) 2008-2012  Laurent Destailleur     <eldy@users.sourceforge.net>
 * Copyright (C) 2011-2012  Regis Houssin       <regis.houssin@inodbox.com>
 * Copyright (C) 2024   MDW           <mdeweerd@users.noreply.github.com>
 * Copyright (C) 2024       Frédéric France         <frederic.france@free.fr>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */
 
require_once DOL_DOCUMENT_ROOT.'/core/lib/payments.lib.php';
 
 
function paypaladmin_prepare_head()
{
  global $langs, $conf;
 
  $h = 0;
  $head = array();
 
  $head[$h][0] = DOL_URL_ROOT."/paypal/admin/paypal.php";
  $head[$h][1] = $langs->trans("PayPal");
  $head[$h][2] = 'paypalaccount';
  $h++;
 
  $object = new stdClass();
 
  // Show more tabs from modules
  // Entries must be declared in modules descriptor with line
  // $this->tabs = array('entity:+tabname:Title:@mymodule:/mymodule/mypage.php?id=__ID__');   to add new tab
  // $this->tabs = array('entity:-tabname);                           to remove a tab
  complete_head_from_modules($conf, $langs, $object, $head, $h, 'paypaladmin');
 
  complete_head_from_modules($conf, $langs, $object, $head, $h, 'paypaladmin', 'remove');
 
  return $head;
}
 
 
function print_paypal_redirect($paymentAmount, $currencyCodeType, $paymentType, $returnURL, $cancelURL, $tag)
{
  //declaring of global variables
  global $conf, $langs;
  global $API_Endpoint, $API_Url, $API_version, $USE_PROXY, $PROXY_HOST, $PROXY_PORT;
  global $PAYPAL_API_USER, $PAYPAL_API_PASSWORD, $PAYPAL_API_SIGNATURE;
 
  global $shipToName, $shipToStreet, $shipToCity, $shipToState, $shipToCountryCode, $shipToZip, $shipToStreet2, $phoneNum;
  global $email, $desc;
 
  //'------------------------------------
  //' Calls the SetExpressCheckout API call
  //'
  //'-------------------------------------------------
 
  if (!getDolGlobalString('PAYPAL_API_INTEGRAL_OR_PAYPALONLY')) {
    $conf->global->PAYPAL_API_INTEGRAL_OR_PAYPALONLY = 'integral';
  }
 
  $solutionType = 'Sole';
  $landingPage = 'Billing';
  // For payment with Paypal only
  if (getDolGlobalString('PAYPAL_API_INTEGRAL_OR_PAYPALONLY') == 'paypalonly') {
    $solutionType = 'Mark';
    $landingPage = 'Login';
  }
  // For payment with Credit card or Paypal
  if (getDolGlobalString('PAYPAL_API_INTEGRAL_OR_PAYPALONLY') == 'integral') {
    $solutionType = 'Sole';
    $landingPage = 'Billing';
  }
  // For payment with Credit card
  if (getDolGlobalString('PAYPAL_API_INTEGRAL_OR_PAYPALONLY') == 'cconly') {
    $solutionType = 'Sole';
    $landingPage = 'Billing';
  }
 
  dol_syslog("print_paypal_redirect expresscheckout redirect with callSetExpressCheckout $paymentAmount, $currencyCodeType, $paymentType, $returnURL, $cancelURL, $tag, $solutionType, $landingPage, $shipToName, $shipToStreet, $shipToCity, $shipToState, $shipToCountryCode, $shipToZip, $shipToStreet2, $phoneNum");
  $resArray = callSetExpressCheckout(
    $paymentAmount,
    $currencyCodeType,
    $paymentType,
    $returnURL,
    $cancelURL,
    $tag,
    $solutionType,
    $landingPage,
    $shipToName,
    $shipToStreet,
    $shipToCity,
    $shipToState,
    $shipToCountryCode,
    $shipToZip,
    $shipToStreet2,
    $phoneNum,
    $email,
    $desc
  );
 
  dol_syslog("print_paypal_redirect resArray=".var_export($resArray, true), LOG_DEBUG);
 
  $ack = strtoupper($resArray["ACK"]);
  if ($ack == "SUCCESS" || $ack == "SUCCESSWITHWARNING") {
    $token = $resArray["TOKEN"];
 
    // Redirect to paypal.com here
    $payPalURL = $API_Url.$token;
    dol_syslog("Redirect to ".$payPalURL, LOG_INFO);
    header("Location: ".$payPalURL);
    exit;
  } 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"]);
 
    if ($ErrorCode == 10729) {
      $mesg = "PayPal can't accept payments for this thirdparty. An address is defined but is not complete (missing State).<br>Ask system administrator to fix address or to setup Paypal module to accept payments even on not complete addresses (remove option PAYPAL_REQUIRE_VALID_SHIPPING_ADDRESS).<br>\n";
    } else {
      $mesg = $langs->trans('SetExpressCheckoutAPICallFailed')."<br>\n";
      $mesg .= $langs->trans('DetailedErrorMessage').": ".$ErrorLongMsg."<br>\n";
      $mesg .= $langs->trans('ShortErrorMessage').": ".$ErrorShortMsg."<br>\n";
      $mesg .= $langs->trans('ErrorCode').": ".$ErrorCode."<br>\n";
      $mesg .= $langs->trans('ErrorSeverityCode').": ".$ErrorSeverityCode."<br>\n";
    }
 
    return $mesg;
  }
}
 
function callSetExpressCheckout($paymentAmount, $currencyCodeType, $paymentType, $returnURL, $cancelURL, $tag, $solutionType, $landingPage, $shipToName, $shipToStreet, $shipToCity, $shipToState, $shipToCountryCode, $shipToZip, $shipToStreet2, $phoneNum, $email = '', $desc = '')
{
  //------------------------------------------------------------------------------------------------------------------------------------
  // Construct the parameter string that describes the SetExpressCheckout API call in the shortcut implementation
 
  //declaring of global variables
  global $conf, $langs, $mysoc;
  global $API_Endpoint, $API_Url, $API_version, $USE_PROXY, $PROXY_HOST, $PROXY_PORT;
  global $PAYPAL_API_USER, $PAYPAL_API_PASSWORD, $PAYPAL_API_SIGNATURE;
 
  $nvpstr = '';
  //$nvpstr = $nvpstr . "&VERSION=".$API_version;       // Already added by hash_call
  $nvpstr = $nvpstr."&RETURNURL=".urlencode($returnURL);
  $nvpstr = $nvpstr."&CANCELURL=".urlencode($cancelURL);
  if (getDolGlobalString('PAYPAL_ALLOW_NOTES')) {
    $nvpstr .= "&ALLOWNOTE=0";
  }
  if (!getDolGlobalString('PAYPAL_REQUIRE_VALID_SHIPPING_ADDRESS')) {
    $nvpstr .= "&NOSHIPPING=1"; // An empty or not complete shipping address will be accepted
  } else {
    $nvpstr .= "&NOSHIPPING=0"; // A valid shipping address is required (full required fields mandatory)
  }
  $nvpstr .= "&SOLUTIONTYPE=".urlencode($solutionType);
  $nvpstr .= "&LANDINGPAGE=".urlencode($landingPage);
  if (getDolGlobalString('PAYPAL_CUSTOMER_SERVICE_NUMBER')) {
    $nvpstr .= "&CUSTOMERSERVICENUMBER=".urlencode(getDolGlobalString('PAYPAL_CUSTOMER_SERVICE_NUMBER')); // Hotline phone number
  }
 
  $paypalprefix = 'PAYMENTREQUEST_0_';
  //$paypalprefix = '';
  if (!empty($paypalprefix) && $paymentType == 'Sole') {
    $paymentType = 'Sale';
  }
 
  $nvpstr = $nvpstr."&AMT=".urlencode((string) ($paymentAmount)); // Total for all elements
 
  $nvpstr = $nvpstr."&".$paypalprefix."INVNUM=".urlencode($tag);
  $nvpstr = $nvpstr."&".$paypalprefix."AMT=".urlencode((string) ($paymentAmount)); // AMT deprecated by paypal -> PAYMENTREQUEST_n_AMT
  $nvpstr = $nvpstr."&".$paypalprefix."ITEMAMT=".urlencode((string) ($paymentAmount)); // AMT deprecated by paypal -> PAYMENTREQUEST_n_AMT
  $nvpstr = $nvpstr."&".$paypalprefix."PAYMENTACTION=".urlencode($paymentType); // PAYMENTACTION deprecated by paypal -> PAYMENTREQUEST_n_PAYMENTACTION
  $nvpstr = $nvpstr."&".$paypalprefix."CURRENCYCODE=".urlencode($currencyCodeType); // CURRENCYCODE deprecated by paypal -> PAYMENTREQUEST_n_CURRENCYCODE
 
  $nvpstr = $nvpstr."&".$paypalprefix."L_PAYMENTREQUEST_0_QTY0=1";
  $nvpstr = $nvpstr."&".$paypalprefix."L_PAYMENTREQUEST_0_AMT0=".urlencode((string) ($paymentAmount));
  $nvpstr = $nvpstr."&".$paypalprefix."L_PAYMENTREQUEST_0_NAME0=".urlencode($desc);
  $nvpstr = $nvpstr."&".$paypalprefix."L_PAYMENTREQUEST_0_NUMBER0=0";
 
  $nvpstr = $nvpstr."&".$paypalprefix."SHIPTONAME=".urlencode($shipToName); // SHIPTONAME deprecated by paypal -> PAYMENTREQUEST_n_SHIPTONAME
  $nvpstr = $nvpstr."&".$paypalprefix."SHIPTOSTREET=".urlencode($shipToStreet); //
  $nvpstr = $nvpstr."&".$paypalprefix."SHIPTOSTREET2=".urlencode($shipToStreet2);
  $nvpstr = $nvpstr."&".$paypalprefix."SHIPTOCITY=".urlencode($shipToCity);
  $nvpstr = $nvpstr."&".$paypalprefix."SHIPTOSTATE=".urlencode($shipToState);
  $nvpstr = $nvpstr."&".$paypalprefix."SHIPTOCOUNTRYCODE=".urlencode($shipToCountryCode);
  $nvpstr = $nvpstr."&".$paypalprefix."SHIPTOZIP=".urlencode($shipToZip);
  $nvpstr = $nvpstr."&".$paypalprefix."PHONENUM=".urlencode($phoneNum);
  if (!empty($email)) {
    $nvpstr = $nvpstr."&".$paypalprefix."EMAIL=".urlencode($email); // EMAIL deprecated by paypal -> PAYMENTREQUEST_n_EMAIL
  }
  if (!empty($desc)) {
    $nvpstr = $nvpstr."&".$paypalprefix."DESC=".urlencode($desc); // DESC deprecated by paypal -> PAYMENTREQUEST_n_DESC
  }
 
  if (getDolGlobalString('PAYPAL_LOGOIMG') && $mysoc->logo) {
    global $dolibarr_main_url_root;
 
    // Define $urlwithroot
    $urlwithouturlroot = preg_replace('/'.preg_quote(DOL_URL_ROOT, '/').'$/i', '', trim($dolibarr_main_url_root));
    $urlwithroot = $urlwithouturlroot.DOL_URL_ROOT; // This is to use external domain name found into config file
    //$urlwithroot=DOL_MAIN_URL_ROOT;         // This is to use same domain name than current
 
    $urllogo = $urlwithroot."/viewimage.php?modulepart=mycompany&file=".urlencode('logos/'.$mysoc->logo);
    $nvpstr = $nvpstr."&LOGOIMG=".urlencode($urllogo);
  }
  if (getDolGlobalString('PAYPAL_BRANDNAME')) {
    $nvpstr = $nvpstr."&BRANDNAME=".urlencode(getDolGlobalString('PAYPAL_BRANDNAME')); // BRANDNAME
  }
  if (getDolGlobalString('PAYPAL_NOTETOBUYER')) {
    $nvpstr = $nvpstr."&NOTETOBUYER=".urlencode(getDolGlobalString('PAYPAL_NOTETOBUYER')); // PAYPAL_NOTETOBUYER
  }
 
  $_SESSION["FinalPaymentAmt"] = $paymentAmount;
  $_SESSION["currencyCodeType"] = $currencyCodeType;
  $_SESSION["PaymentType"] = $paymentType; // 'Mark', 'Sole'
  $_SESSION['ipaddress'] = getUserRemoteIP(); // Payer ip
 
  //'---------------------------------------------------------------------------------------------------------------
  //' Make the API call to PayPal
  //' If the API call succeeded, then redirect the buyer to PayPal to begin to authorize payment.
  //' If an error occurred, show the resulting errors
  //'---------------------------------------------------------------------------------------------------------------
  $resArray = hash_call("SetExpressCheckout", $nvpstr);
  $ack = strtoupper($resArray["ACK"]);
  if ($ack == "SUCCESS" || $ack == "SUCCESSWITHWARNING") {
    $token = urldecode($resArray["TOKEN"]);
    $_SESSION['TOKEN'] = $token;
  }
 
  return $resArray;
}
 
function getDetails($token)
{
  //'--------------------------------------------------------------
  //' At this point, the buyer has completed authorizing the payment
  //' at PayPal.  The function will call PayPal to obtain the details
  //' of the authorization, including any shipping information of the
  //' buyer.  Remember, the authorization is not a completed transaction
  //' at this state - the buyer still needs an additional step to finalize
  //' the transaction
  //'--------------------------------------------------------------
 
  //declaring of global variables
  global $conf, $langs;
  global $API_Endpoint, $API_Url, $API_version, $USE_PROXY, $PROXY_HOST, $PROXY_PORT;
  global $PAYPAL_API_USER, $PAYPAL_API_PASSWORD, $PAYPAL_API_SIGNATURE;
 
  //'---------------------------------------------------------------------------
  //' Build a second API request to PayPal, using the token as the
  //'  ID to get the details on the payment authorization
  //'---------------------------------------------------------------------------
  $nvpstr = "&TOKEN=".$token;
 
  //'---------------------------------------------------------------------------
  //' Make the API call and store the results in an array.
  //' If the call was a success, show the authorization details, and provide
  //'     an action to complete the payment.
  //' If failed, show the error
  //'---------------------------------------------------------------------------
  $resArray = hash_call("GetExpressCheckoutDetails", $nvpstr);
  $ack = strtoupper($resArray["ACK"]);
  if ($ack == "SUCCESS" || $ack == "SUCCESSWITHWARNING") {
    $_SESSION['payer_id'] = $resArray['PAYERID'];
  }
  return $resArray;
}
 
 
function confirmPayment($token, $paymentType, $currencyCodeType, $payerID, $ipaddress, $FinalPaymentAmt, $tag)
{
  /* Gather the information to make the final call to
   finalize the PayPal payment.  The variable nvpstr
   holds the name value pairs
   */
 
  //declaring of global variables
  global $conf, $langs;
  global $API_Endpoint, $API_Url, $API_version, $USE_PROXY, $PROXY_HOST, $PROXY_PORT;
  global $PAYPAL_API_USER, $PAYPAL_API_PASSWORD, $PAYPAL_API_SIGNATURE;
 
  $nvpstr = '';
  $nvpstr .= '&TOKEN='.urlencode($token);
  $nvpstr .= '&PAYERID='.urlencode($payerID);
  $nvpstr .= '&PAYMENTACTION='.urlencode($paymentType);
  $nvpstr .= '&AMT='.urlencode($FinalPaymentAmt);
  $nvpstr .= '&CURRENCYCODE='.urlencode($currencyCodeType);
  $nvpstr .= '&IPADDRESS='.urlencode($ipaddress);
  $nvpstr .= '&INVNUM='.urlencode($tag);
 
  /* Make the call to PayPal to finalize payment
   If an error occurred, show the resulting errors
   */
  $resArray = hash_call("DoExpressCheckoutPayment", $nvpstr);
 
  /* Display the API response back to the browser.
   If the response from PayPal was a success, display the response parameters'
   If the response was an error, display the errors received using APIError.php.
   */
  $ack = strtoupper($resArray["ACK"]);
 
  return $resArray;
}
 
/*
function DirectPayment($paymentType, $paymentAmount, $creditCardType, $creditCardNumber, $expDate, $cvv2, $firstName, $lastName, $street, $city, $state, $zip, $countryCode, $currencyCode, $tag)
{
  //declaring of global variables
  global $conf, $langs;
  global $API_Endpoint, $API_Url, $API_version, $USE_PROXY, $PROXY_HOST, $PROXY_PORT;
  global $PAYPAL_API_USER, $PAYPAL_API_PASSWORD, $PAYPAL_API_SIGNATURE;
 
  //Construct the parameter string that describes DoDirectPayment
  $nvpstr = '';
  $nvpstr = $nvpstr . "&AMT=" . urlencode($paymentAmount);              // deprecated by paypal
  $nvpstr = $nvpstr . "&CURRENCYCODE=" . urlencode($currencyCode);
  $nvpstr = $nvpstr . "&PAYMENTACTION=" . urlencode($paymentType);      // deprecated by paypal
  $nvpstr = $nvpstr . "&CREDITCARDTYPE=" . urlencode($creditCardType);
  $nvpstr = $nvpstr . "&ACCT=" . urlencode($creditCardNumber);
  $nvpstr = $nvpstr . "&EXPDATE=" . urlencode($expDate);
  $nvpstr = $nvpstr . "&CVV2=" . urlencode($cvv2);
  $nvpstr = $nvpstr . "&FIRSTNAME=" . urlencode($firstName);
  $nvpstr = $nvpstr . "&LASTNAME=" . urlencode($lastName);
  $nvpstr = $nvpstr . "&STREET=" . urlencode($street);
  $nvpstr = $nvpstr . "&CITY=" . urlencode($city);
  $nvpstr = $nvpstr . "&STATE=" . urlencode($state);
  $nvpstr = $nvpstr . "&COUNTRYCODE=" . urlencode($countryCode);
  $nvpstr = $nvpstr . "&IPADDRESS=" . getUserRemotIP();
  $nvpstr = $nvpstr . "&INVNUM=" . urlencode($tag);
 
  $resArray=hash_call("DoDirectPayment", $nvpstr);
 
  return $resArray;
}
*/
 
 
function hash_call($methodName, $nvpStr)
{
  //declaring of global variables
  global $conf, $langs;
  global $API_Endpoint, $API_Url, $API_version, $USE_PROXY, $PROXY_HOST, $PROXY_PORT, $PROXY_USER, $PROXY_PASS;
  global $PAYPAL_API_USER, $PAYPAL_API_PASSWORD, $PAYPAL_API_SIGNATURE;
 
  // TODO problem with triggers
  $API_version = "98.0";
  if (getDolGlobalString('PAYPAL_API_SANDBOX') || GETPOST('forcesandbox', 'alpha')) {   // We can force sand box with param 'forcesandbox'
    $API_Endpoint = "https://api-3t.sandbox.paypal.com/nvp";
    $API_Url = "https://www.sandbox.paypal.com/webscr?cmd=_express-checkout&token=";
  } else {
    $API_Endpoint = "https://api-3t.paypal.com/nvp";
    $API_Url = "https://www.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=";
  }
 
  // Clean parameters
  $PAYPAL_API_USER = getDolGlobalString('PAYPAL_API_USER');
  $PAYPAL_API_PASSWORD = getDolGlobalString('PAYPAL_API_PASSWORD');
  $PAYPAL_API_SIGNATURE = getDolGlobalString('PAYPAL_API_SIGNATURE');
  $PAYPAL_API_SANDBOX = getDolGlobalString('PAYPAL_API_SANDBOX');
  // TODO END problem with triggers
 
  dol_syslog("Paypal API endpoint ".$API_Endpoint);
 
  //setting the curl parameters.
  $ch = curl_init();
 
  /*print $API_Endpoint."-".$API_version."-".$PAYPAL_API_USER."-".$PAYPAL_API_PASSWORD."-".$PAYPAL_API_SIGNATURE."<br>";
   print $USE_PROXY."-".$gv_ApiErrorURL."<br>";
   print $nvpStr;
   exit;*/
  curl_setopt($ch, CURLOPT_URL, $API_Endpoint);
  curl_setopt($ch, CURLOPT_VERBOSE, 1);
  // TLSv1 by default or change to TLSv1.2 in module configuration
  curl_setopt($ch, CURLOPT_SSLVERSION, (!getDolGlobalString('PAYPAL_SSLVERSION') ? 1 : $conf->global->PAYPAL_SSLVERSION));
 
  $ssl_verifypeer = -1;
 
  // Turning on or off the ssl target certificate
  if ($ssl_verifypeer < 0) {
    global $dolibarr_main_prod;
    $ssl_verifypeer =  ($dolibarr_main_prod ? true : false);
  }
  if (getDolGlobalString('MAIN_CURL_DISABLE_VERIFYPEER')) {
    $ssl_verifypeer = 0;
  }
 
  //turning off the server and peer verification(TrustManager Concept).
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, ($ssl_verifypeer ? true : false));
  curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, ($ssl_verifypeer ? true : false));
 
  curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, getDolGlobalInt('MAIN_USE_CONNECT_TIMEOUT', 5));
  curl_setopt($ch, CURLOPT_TIMEOUT, getDolGlobalInt('MAIN_USE_RESPONSE_TIMEOUT', 30));
 
  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.
  if ($USE_PROXY) {
    dol_syslog("Paypal API hash_call set proxy to ".$PROXY_HOST.":".$PROXY_PORT." - ".$PROXY_USER.":".$PROXY_PASS);
    //curl_setopt ($ch, CURLOPT_PROXYTYPE, CURLPROXY_HTTP); // Curl 7.10
    curl_setopt($ch, CURLOPT_PROXY, $PROXY_HOST.":".$PROXY_PORT);
    if ($PROXY_USER) {
      curl_setopt($ch, CURLOPT_PROXYUSERPWD, $PROXY_USER.":".$PROXY_PASS);
    }
  }
 
  //NVPRequest for submitting to server
  $nvpreq = "METHOD=".urlencode($methodName)."&VERSION=".urlencode($API_version)."&PWD=".urlencode($PAYPAL_API_PASSWORD)."&USER=".urlencode($PAYPAL_API_USER)."&SIGNATURE=".urlencode($PAYPAL_API_SIGNATURE).$nvpStr;
  $nvpreq .= "&LOCALECODE=".strtoupper($langs->getDefaultLang(1));
  //$nvpreq.="&BRANDNAME=".urlencode();       // Override merchant name
  //$nvpreq.="&NOTIFYURL=".urlencode();       // For Instant Payment Notification url
 
 
  dol_syslog("Paypal API hash_call nvpreq=".$nvpreq);
 
  //setting the nvpreq as POST FIELD to curl
  curl_setopt($ch, CURLOPT_POSTFIELDS, $nvpreq);
 
  //getting response from server
  $response = curl_exec($ch);
 
  $nvpReqArray = deformatNVP($nvpreq);
  $_SESSION['nvpReqArray'] = $nvpReqArray;
 
  //convrting NVPResponse to an Associative Array
  dol_syslog("Paypal API hash_call Response nvpresp=".$response);
  $nvpResArray = deformatNVP($response);
 
  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;
}
 
 
function deformatNVP($nvpstr)
{
  $initial = 0;
  $nvpArray = array();
 
  while (strlen($nvpstr)) {
    //position of Key
    $keypos = strpos($nvpstr, '=');
    //position of value
    $valuepos = strpos($nvpstr, '&') ? strpos($nvpstr, '&') : strlen($nvpstr);
 
    /*getting the Key and Value values and storing in a Associative Array*/
    $keyval = substr($nvpstr, $initial, $keypos);
    $valval = substr($nvpstr, $keypos + 1, $valuepos - $keypos - 1);
    //decoding the response
    $nvpArray[urldecode($keyval)] = urldecode($valval);
    $nvpstr = substr($nvpstr, $valuepos + 1, strlen($nvpstr));
  }
  return $nvpArray;
}
 
function getApiError()
{
  $errors = array();
 
  $resArray = $_SESSION['reshash'];
 
  if (isset($_SESSION['curl_error_no'])) {
    $errors[] = $_SESSION['curl_error_no'].'-'.$_SESSION['curl_error_msg'];
  }
 
  foreach ($resArray as $key => $value) {
    $errors[] = $key.'-'.$value;
  }
 
  return $errors;
}