Paypal NVP with php error - php

Question

I am trying to get up and running using Paypal's NVP interface for my website to process my custom cart. I've downloaded their sample code (here) and have tried to run unaltered without success. Any function I choose (e.g. express checkout sale) gives the curl_errno() error: Error Number: 3 Error Message: No URL set! I have tried this both on localhost and on my hosted site.
hash_call() is the function processing the call to Paypal. The code which calls hash_call() is also included below.Their code that sets urls is:
$returnURL =urlencode($url.'/ReviewOrder.php?currencyCodeType='.$currencyCodeType.'&paymentType='.$paymentType);
$cancelURL =urlencode("$url/SetExpressCheckout.php?paymentType=$paymentType" );
I thought the cancelURL line looked off and modified it to:
$cancelURL =urlencode($url.'/SetExpressCheckout.php?paymentType='.$paymentType );
Neither have worked. Any help would be appreciated. I've never worked with curl.
require_once 'CallerService.php';
session_start();
if(! isset($_REQUEST['token'])) {
/* The servername and serverport tells PayPal where the buyer
should be directed back to after authorizing payment.
In this case, its the local webserver that is running this script
Using the servername and serverport, the return URL is the first
portion of the URL that buyers will return to after authorizing payment
*/
$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'];
$L_NAME0 = $_REQUEST['L_NAME0'];
$L_AMT0 = $_REQUEST['L_AMT0'];
$L_QTY0 = $_REQUEST['L_QTY0'];
$L_NAME1 = $_REQUEST['L_NAME1'];
$L_AMT1 = $_REQUEST['L_AMT1'];
$L_QTY1 = $_REQUEST['L_QTY1'];
/* The returnURL is the location where buyers return when a
payment has been succesfully authorized.
The cancelURL is the location buyers are sent to when they hit the
cancel button during authorization of payment during the PayPal flow
*/
$returnURL =urlencode($url.'/ReviewOrder.php?currencyCodeType='.$currencyCodeType.'&paymentType='.$paymentType);
$cancelURL =urlencode($url.'/SetExpressCheckout.php?paymentType='.$paymentType );
/* Construct the parameter string that describes the PayPal payment
the varialbes were set in the web form, and the resulting string
is stored in $nvpstr
*/
$itemamt = 0.00;
$itemamt = $L_QTY0*$L_AMT0+$L_AMT1*$L_QTY1;
$amt = 5.00+2.00+1.00+$itemamt;
$maxamt= $amt+25.00;
$nvpstr="";
/*
* Setting up the Shipping address details
*/
$shiptoAddress = "&SHIPTONAME=$personName&SHIPTOSTREET=$SHIPTOSTREET&SHIPTOCITY=$SHIPTOCITY&SHIPTOSTATE=$SHIPTOSTATE&SHIPTOCOUNTRYCODE=$SHIPTOCOUNTRYCODE&SHIPTOZIP=$SHIPTOZIP";
$nvpstr="&ADDRESSOVERRIDE=1$shiptoAddress&L_NAME0=".$L_NAME0."&L_NAME1=".$L_NAME1."&L_AMT0=".$L_AMT0."&L_AMT1=".$L_AMT1."&L_QTY0=".$L_QTY0."&L_QTY1=".$L_QTY1."&MAXAMT=".(string)$maxamt."&AMT=".(string)$amt."&ITEMAMT=".(string)$itemamt."&CALLBACKTIMEOUT=4&L_SHIPPINGOPTIONAMOUNT1=8.00&L_SHIPPINGOPTIONlABEL1=UPS Next Day Air&L_SHIPPINGOPTIONNAME1=UPS Air&L_SHIPPINGOPTIONISDEFAULT1=true&L_SHIPPINGOPTIONAMOUNT0=3.00&L_SHIPPINGOPTIONLABEL0=UPS Ground 7 Days&L_SHIPPINGOPTIONNAME0=Ground&L_SHIPPINGOPTIONISDEFAULT0=false&INSURANCEAMT=1.00&INSURANCEOPTIONOFFERED=true&CALLBACK=https://www.ppcallback.com/callback.pl&SHIPPINGAMT=8.00&SHIPDISCAMT=-3.00&TAXAMT=2.00&L_NUMBER0=1000&L_DESC0=Size: 8.8-oz&L_NUMBER1=10001&L_DESC1=Size: Two 24-piece boxes&L_ITEMWEIGHTVALUE1=0.5&L_ITEMWEIGHTUNIT1=lbs&ReturnUrl=".$returnURL."&CANCELURL=".$cancelURL ."&CURRENCYCODE=".$currencyCodeType."&PAYMENTACTION=".$paymentType;
/* Make the call to PayPal to set the Express Checkout token
If the API call succeded, then redirect the buyer to PayPal
to begin to authorize payment. If an error occured, show the
resulting errors
*/
$resArray=hash_call("SetExpressCheckout",$nvpstr);
*********************************************************************************
/**
* hash_call: Function to perform the API call to PayPal using API signature
* #methodName is name of API method.
* #nvpStr is nvp string.
* returns an associtive array containing the response from the server.
*/
function hash_call($methodName,$nvpStr)
{
//declaring of global variables
global $API_Endpoint,$version,$API_UserName,$API_Password,$API_Signature,$nvp_Header, $subject, $AUTH_token,$AUTH_signature,$AUTH_timestamp;
// form header string
$nvpheader=nvpHeader();
//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($ch, CURLOPT_SSL_VERIFYPEER, TRUE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, TRUE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_POST, 1);
//WARNING: this would prevent curl from detecting a 'man in the middle' attack
$ch = curl_init();
//curl_setopt ($ch, CURLOPT_SSL_VERIFYHOST, 0);
//curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, TRUE);
curl_setopt ($ch, CURLOPT_CAINFO, "c:/xampp/apache/cacert.pem");
//in case of permission APIs send headers as HTTPheders
if(!empty($AUTH_token) && !empty($AUTH_signature) && !empty($AUTH_timestamp))
{
$headers_array[] = "X-PP-AUTHORIZATION: ".$nvpheader;
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers_array);
curl_setopt($ch, CURLOPT_HEADER, false);
}
else
{
$nvpStr=$nvpheader.$nvpStr;
}
//if USE_PROXY constant set to TRUE in Constants.php, then only proxy will be enabled.
//Set proxy name to PROXY_HOST and port number to PROXY_PORT in constants.php
if(USE_PROXY)
curl_setopt ($ch, CURLOPT_PROXY, PROXY_HOST.":".PROXY_PORT);
//check if version is included in $nvpStr else include the version.
if(strlen(str_replace('VERSION=', '', strtoupper($nvpStr))) == strlen($nvpStr)) {
$nvpStr = "&VERSION=" . urlencode($version) . $nvpStr;
}
$nvpreq="METHOD=".urlencode($methodName).$nvpStr;
//setting the nvpreq as POST FIELD to curl
curl_setopt($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);
$location = "APIError.php";
header("Location: $location");
} else {
//closing the curl
curl_close($ch);
}
return $nvpResArray;
}

Answer 1

Try this class,
<?php
class ZC_Paypal
{
public $API_USERNAME;
public $API_PASSWORD;
public $API_SIGNATURE='xxxxxxxxxxxxxxxxxxxxxxxxxxxx';
public $API_ENDPOINT;
public $USE_PROXY;
public $PROXY_HOST;
public $PROXY_PORT;
public $PAYPAL_URL;
public $VERSION;
public $NVP_HEADER;
public $SSLCERTPATH;
function __construct($PROXY_HOST, $PROXY_PORT, $IS_ONLINE = FALSE, $USE_PROXY = FALSE, $VERSION = '51.0', $api_url)
{
/*$this->API_USERNAME = $API_USERNAME;
$this->API_PASSWORD = $API_PASSWORD;
$this->API_SIGNATURE = $API_SIGNATURE;*/
//$this->API_ENDPOINT = 'https://api-3t.sandbox.paypal.com/nvp';
$this->API_ENDPOINT = $api_url;
$this->USE_PROXY = $USE_PROXY;
if($this->USE_PROXY == true)
{
$this->PROXY_HOST = $PROXY_HOST;
$this->PROXY_PORT = $PROXY_PORT;
}
else
{
$this->PROXY_HOST = '127.0.0.1';
$this->PROXY_PORT = '808';
}
if($IS_ONLINE == FALSE)
{
$this->PAYPAL_URL = 'https://api-3t.sandbox.paypal.com/nvp';
}
else
{
$this->PAYPAL_URL = 'https://api-3t.paypal.com/nvp';
}
$this->VERSION = $VERSION;
}
function hash_call($methodName,$nvpStr,$uname,$pwd,$api_url,$sslcerpath)
{
$this->API_ENDPOINT = $api_url;
$this->API_PASSWORD = $pwd;
$this->API_USERNAME = $uname;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$this->API_ENDPOINT);
//curl_setopt($ch, CURLOPT_SSLCERT, $sslcerpath);
curl_setopt($ch, CURLOPT_VERBOSE, 1);
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($this->USE_PROXY)
{
curl_setopt ($ch, CURLOPT_PROXY, $this->PROXY_HOST.":".$this->PROXY_PORT);
}
$nvpreq="METHOD=".urlencode($methodName)."&VERSION=".urlencode($this->VERSION)."&PWD=".urlencode($this->API_PASSWORD)."&USER=".urlencode($this->API_USERNAME)."&SIGNATURE=".urlencode($this->API_SIGNATURE).$nvpStr;
curl_setopt($ch,CURLOPT_POSTFIELDS,$nvpreq);
$response = curl_exec($ch);
$nvpResArray=$this->deformatNVP($response);
$nvpReqArray=$this->deformatNVP($nvpreq);
$_SESSION['nvpReqArray']=$nvpReqArray;
if (curl_errno($ch))
{
die("CURL send a error during perform operation: ".curl_errno($ch));
}
else
{
curl_close($ch);
}
return $nvpResArray;
}
function deformatNVP($nvpstr)
{
$intial=0;
$nvpArray = array();
while(strlen($nvpstr))
{
$keypos= strpos($nvpstr,'=');
$valuepos = strpos($nvpstr,'&') ? strpos($nvpstr,'&'): strlen($nvpstr);
$keyval=substr($nvpstr,$intial,$keypos);
$valval=substr($nvpstr,$keypos+1,$valuepos-$keypos-1);
$nvpArray[urldecode($keyval)] =urldecode( $valval);
$nvpstr=substr($nvpstr,$valuepos+1,strlen($nvpstr));
}
return $nvpArray;
}
function __destruct()
{
}
}
and call above class like,
....
$currencyCode="USD";
//$paymentAction = urlencode("Sale");
$paymentAction = urlencode("Authorization");
$nvpRecurring = '';
$methodToCall = 'doDirectPayment';
$nvpstr='&PAYMENTACTION='.$paymentAction.'&AMT='.$amount.'&CREDITCARDTYPE='.$creditCardType.'&ACCT='.$creditCardNumber.'&EXPDATE='.$padDateMonth.$expDateYear.'&CVV2='.$cvv2Number.'&FIRSTNAME='.$firstName.'&LASTNAME='.$lastName.'&STREET='.$address1.'&CITY='.$city.'&STATE='.$state.'&ZIP='.$zip.'&COUNTRYCODE='.$country.'&CURRENCYCODE='.$currencyCode.$nvpRecurring;
$paypalPro = new ZC_Paypal( '', '', FALSE, FALSE,'51.0',Zend_Registry::get("admin_paypal_pro_url"));
$resArray = $paypalPro->hash_call($methodToCall,$nvpstr,Zend_Registry::get("admin_paypal_user_name"), Zend_Registry::get("admin_paypal_password"),Zend_Registry::get("admin_paypal_pro_url"),Zend_Registry::get("admin_paypal_ssl_path"));
$ack = strtoupper($resArray["ACK"]);
//echo '<pre>'; print_r($resArray); exit;
if($ack!="SUCCESS")
{
if(!in_array($resArray["L_LONGMESSAGE0"], array('Internal Error', 'CURL send a error during perform operation: 6')))
echo $resArray["L_LONGMESSAGE0"];
else
echo 'Transaction Failed, Try again later.';
}
else{
// if success .....
}
pass credential in respective variable,i am using zend, so try to use core php here...