Paypal Rest API支付驗證serverside

Question

我已經使用paypal在我的服務器上設置了付款，在做了一些檢查之後，它將用戶重定向到paypal付款頁面，然後用戶通過一個自定義參數'approved'='ok將用戶重定向到我的網站'或'nok'。除此之外，我還在GET參數中獲得了3個字段，即payment-id，payerid和令牌成功。我想驗證這些參數是否來自貝寶，並檢查付款狀態用戶是否真的只在服務器端支付金額。

有人會幫忙嗎？準備提供更多信息。

我返回URL的樣子：提前 http://localhost/test/payment.php?approved=ok&paymentId=PAY-6P3424788A4717248KYR6EPA&token=EC-0V6779052Y720131T&PayerID=JWTZXBN9AEBMC

感謝。

Answer 1

您可以在發送參數到paypal後看到交易狀態，並返回響應錯誤或成功消息。下面是支付過程的一個完整的例子與經常性的和普通付款後：

 
// Parameters for SetExpressCheckout, which will be sent to PayPal
 
$padata['L_BILLINGAGREEMENTDESCRIPTION0'] = 'Product description'; 
$padata['L_BILLINGAGREEMENTDESCRIPTION0'] = $padata['L_BILLINGAGREEMENTDESCRIPTION0'] . 
' $'.$product->price.'/month'; 
$padata['L_PAYMENTREQUEST_0_DESC0']   = $padata['L_BILLINGAGREEMENTDESCRIPTION0'] . 
' $'.$product->price.'/month';
$padata['PAYMENTREQUEST_0_NOTIFYURL']  = 'http://site_url/paypal/ipn'; 
$padata['PAYMENTREQUEST_0_DESC']   = $product->name; 
$padata['RETURNURL']      = 'http://site_url/paypal/returnurl'; 
$padata['CANCELURL']      = 'http://site_url/paypal/cancelurl';
 
$padata['PAYMENTREQUEST_0_CURRENCYCODE'] = 'USD'; 
$padata['PAYMENTREQUEST_0_PAYMENTACTION'] = 'SALE'; 
$padata['PAYMENTREQUEST_0_ITEMAMT'] = $product->price;
$padata['PAYMENTREQUEST_0_AMT']  = $product->price;
$padata['L_BILLINGTYPE0']   = 'RecurringPayments';
$padata['L_PAYMENTREQUEST_0_NAME0'] = $product->name;
$padata['L_PAYMENTREQUEST_0_NUMBER0']= '322';
$padata['L_PAYMENTREQUEST_0_QTY0'] = '1';
$padata['L_PAYMENTREQUEST_0_AMT0'] = $product->price;
 

$paypal_data   = http_build_query($padata); 
$httpParsedResponseAr = $this->PPHttpPost('SetExpressCheckout', $paypal_data); 

//Respond according to message we receive from Paypal 
if("SUCCESS" == strtoupper($httpParsedResponseAr["ACK"]) || "SUCCESSWITHWARNING" == strtoupper($httpParsedResponseAr["ACK"])){ 

    //Redirect user to PayPal store with Token received. 
    $paypalurl ='https://www.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token='.$httpParsedResponseAr["TOKEN"].''; 
    header('Location: '.$paypalurl); 

}else{ 
    echo 'Error :'.urldecode($httpParsedResponseAr["L_LONGMESSAGE0"]).'';
 

} 

頁RETURNURL：

 
$hosteddata['L_BILLINGAGREEMENTDESCRIPTION0'] = 'Recurring Description';
$hosteddata['L_BILLINGAGREEMENTDESCRIPTION0'] = $hosteddata['L_BILLINGAGREEMENTDESCRIPTION0'] . ' $'.$pr->price.'/month';
$hosteddata['L_PAYMENTREQUEST_0_NAME0']   = $pr->name;
$hosteddata['PROFILEREFERENCE']     = $GetExpressCheckoutDetails['L_PAYMENTREQUEST_0_NUMBER0'];
$hosteddata['PROFILESTARTDATE']     = date('Y-m-d') . 'T' . date('H:i:s').'Z';
$hosteddata['SUBSCRIBERNAME']     = $GetExpressCheckoutDetails['FIRSTNAME'] . ' ' . $GetExpressCheckoutDetails['LASTNAME'];
$hosteddata['TOKEN']       = urlencode($_POST['token']);
$hosteddata['DESC']        = $hosteddata['L_BILLINGAGREEMENTDESCRIPTION0'];
$hosteddata['AMT']        = $pr->price;
$hosteddata['BILLINGPERIOD']     = 'Month';
$hosteddata['BILLINGFREQUENCY']     = '1';
$hosteddata['TOTALBILLINGCYCLES']    = '12';
$hosteddata['REGULARTOTALBILLINGCYCLES']  = '1';
$hosteddata['VERSION']       = '74.0';
$hosteddata['MAXFAILEDPAYMENTS']    = '1';
$hosteddata['L_PAYMENTREQUEST_0_QTY0']   = '1';
$hosteddata['L_BILLINGTYPE0']     = 'RecurringPayments';
$hosteddata['L_PAYMENTREQUEST_0_ITEMCATEGORY0'] = 'Digital';
$hosteddata['L_PAYMENTREQUEST_0_AMT0']   = $pr->price;
$hosteddata['INITAMT']       = $pr->price;
$hosteddata['L_PAYMENTREQUEST_0_NUMBER0']  = $pr->id;
$hosteddata['PAYMENTREQUEST_0_NOTIFYURL']  = 'http://site_url/paypal/ipn';
 

$paypal_data = http_build_query($hosteddata); 
$hosted_saas_response = $this->PPHttpPost('CreateRecurringPaymentsProfile', $paypal_data);
 

我用一個單獨的方法來發布參數到PayPal

 
private function PPHttpPost($methodName_, $nvpStr_) {
 
$api_username = 'yourpaypal@email.com'; 
$api_password = 'QWEQWEWQEQWEQEQWE';
$api_signature = 'WQEQWEQWEQWEWQEQWEQWEQWEQWEQWE.cT';
$api_endpoint = "https://api-3t.paypal.com/nvp";
$version  = '124.0'; 

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $api_endpoint);
 curl_setopt($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);
 
$nvpreq = "METHOD=$methodName_&VERSION=$version&PWD=$api_password&USER=$api_username&SIGNATURE=$api_signature&$nvpStr_";
 
curl_setopt($ch, CURLOPT_POSTFIELDS, $nvpreq);
$httpResponse = curl_exec($ch); 

    if(!$httpResponse) { 
     exit("$methodName_ failed: ".curl_error($ch).'('.curl_errno($ch).')');
} 

    // Extract the response details. 
    $httpResponseAr = explode("&", $httpResponse);
 
    $httpParsedResponseAr = array(); 
    foreach ($httpResponseAr as $i => $value) { 
     $tmpAr = explode("=", $value); 
     if(sizeof($tmpAr) > 1) { 
      $httpParsedResponseAr[$tmpAr[0]] = $tmpAr[1]; 
     } 
    } 

    if((0 == sizeof($httpParsedResponseAr)) || !array_key_exists('ACK', $httpParsedResponseAr)) {
 
     exit("Invalid HTTP Response for POST request($nvpreq) to $api_endpoint.");
 
    } 

    return $httpParsedResponseAr;
 
} 

SetExpressCheckout一次性普通付款的參數：

 
// Parameters for SetExpressCheckout for one time ordinary payment
$padata['L_BILLINGAGREEMENTDESCRIPTION0'] = 'Product descriptuion;
$padata['L_PAYMENTREQUEST_0_DESC0']   = $padata['L_BILLINGAGREEMENTDESCRIPTION0'];
$padata['PAYMENTREQUEST_0_NOTIFYURL']  = 'http://siteurl.com/paypal/ipn';
$padata['PAYMENTREQUEST_0_DESC']   = $padata['L_BILLINGAGREEMENTDESCRIPTION0'];
$padata['RETURNURL']      = 'http://siteurl.com/paypal/returnToDownload';
$padata['CANCELURL']      = 'http://siteurl.com/paypal/cancelurl';
 
$padata['PAYMENTREQUEST_0_CURRENCYCODE'] = 'USD';
$padata['PAYMENTREQUEST_0_PAYMENTACTION'] = 'SALE';
$padata['PAYMENTREQUEST_0_ITEMAMT']   = $product->price;
$padata['PAYMENTREQUEST_0_AMT']    = $product->price;
$padata['L_PAYMENTREQUEST_0_NAME0']   = $product->price;
 
$padata['L_PAYMENTREQUEST_0_NUMBER0']  = 'verification_id#@@#!@#!@#@!!@#ASDASD';
$padata['L_PAYMENTREQUEST_0_QTY0']   = '1';
$padata['L_PAYMENTREQUEST_0_AMT0']   = $product->price;