我正在尝试使用 Paypal 的 NVP 界面启动并运行我的网站来处理我的自定义购物车。我已经下载了他们的示例代码（在这里）并试图在没有成功的情况下运行。我选择的任何功能（例如快速结帐销售）都会出现 curl_errno() 错误：错误编号：3 错误消息：未设置 URL！ 我在 localhost 和我的托管站点上都试过这个。
hash_call() 是处理对 Paypal 的调用的函数。调用 hash_call() 的代码也包含在下面。他们设置 url 的代码是：
$returnURL =urlencode($url.'/ReviewOrder.php?currencyCodeType='.$currencyCodeType.'&paymentType='.$paymentType);
$cancelURL =urlencode("$url/SetExpressCheckout.php?paymentType=$paymentType");
我认为 cancelURL 行已关闭并将其修改为：
$cancelURL =urlencode($url.'/SetExpressCheckout.php?paymentType='.$paymentType);
两者都没有工作。任何帮助，将不胜感激。我从未使用过 curl。
require_once 'CallerService.php';
session_start();
if(! isset($_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;
}