paypal - 使用Rest api，首付款金额较低，折扣优惠的Paypal订阅？

您必须使用paypal express checkout api才能执行此操作。

From paypal api documentation - https://developer.paypal.com/docs/classic/express-checkout/ht_ec-freeTrialRecurringPayments-curl-etc/

使用api方法CreateRecurringPaymentsProfile可以更改：

RIALBILLINGPERIOD：一个试用期的一段时间。例如，一个月。
TRIALBILLINGFREQUENCY：一段时间内的收费频率（如果有）。
TRIALBILLINGFREQUENCY：一段时间内的收费频率（如果有）。
TRIALTOTALBILLINGCYCLES：试用期的长度。也就是说，审判中的期数。
TRIALAMT：试用期间的付款金额。例如，零。

你必须设置参数$ fields ['INITAMT'] = $ 10;和其他参数定期支付到每月100美元：

$fields['INITAMT']  = 10;
$fields['L_PAYMENTREQUEST_0_AMT0'] = 100;
$fields['AMT'] = 100;

在这种情况下，您将立即收取10美元，之后每个月将收取100美元的定期付款。

这是一个简单的（PHP）示例，如何使用多个产品设置交易（也定期付款）：

// 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;
$padata['L_PAYMENTREQUEST_0_NAME1']        = 'Second Product name';
$hosteddata['L_PAYMENTREQUEST_0_DESC1']    = 'second product description';
$hosteddata['L_PAYMENTREQUEST_0_NUMBER1']  = $secondproduct->id;
$hosteddata['L_PAYMENTREQUEST_0_QTY1']      = '1';
$hosteddata['L_PAYMENTREQUEST_0_AMT1']      = $secondproduct->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"]).'';


}

在returnurl上获取令牌后的脚本：

$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';

$padata['L_PAYMENTREQUEST_0_NAME1']      = 'Second Product name';
$hosteddata['L_PAYMENTREQUEST_0_DESC1']         = 'second product description';
$hosteddata['L_PAYMENTREQUEST_0_NUMBER1']       = $secondproduct->id;
$hosteddata['L_PAYMENTREQUEST_0_QTY1']            = '1';
$hosteddata['L_PAYMENTREQUEST_0_AMT1']           = $secondproduct->price;

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

我使用了一个单独的方法将参数发布到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;

}

使用Rest api，首付款金额较低，折扣优惠的Paypal订阅？

1 个答案: