Paypal订阅，首付金额更低，折扣更低，使用Rest api？

我们正在使用RESTAPI的计费协议，并且我们能够在sandbox上成功地做到这一点。 现在我们有第一个月的折扣要求， 因此，如果用户每月有100美元的协议，并且当用户申请一些推荐优惠券时，他将在第一个月获得10美元的折扣。即，他应该在第一个月收取90美元，在协议期内继续收取100美元。

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除了设置费，我看不到任何选项，但这只能用于额外费用，即增加计划金额，但不能减少任何东西。

您必须使用paypal express checkout api来完成此操作

使用api方法CreateRecurringPaymentsProfile，您可以更改：

RIALBILLINGPERIOD：一个试验期内的一段时间。例如，一个月

试用频率：一段时间内的收费频率（如有）

试用频率：一段时间内的收费频率（如有）

三个周期：试验期的长度。也就是说，试验的周期数

试用期：试用期内的付款金额。例如，零

必须设置参数$fields['INITAMT']=$10；以及每月100美元的定期付款的其他参数：

$fields['INITAMT'] = 10;
$fields['L_PAYMENTREQUEST_0_AMT0'] = 100;
$fields['AMT'] = 100; $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，之后每月将收取100美元的定期付款

这里有一个简单的（PHP）示例，说明如何设置多个产品的交易（也包括定期付款）：

// 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"]).'';
} //SetExpressCheckout的参数，将发送到PayPal
$padata['L_BILLINGAGREEMENTDESCRIPTION0']=“产品说明”； $padata['L_BILLINGAGREEMENTDESCRIPTION0']=$padata['L_BILLINGAGREEMENTDESCRIPTION0']。 “$”.$product->price.“/月”； $padata['L_PAYMENTREQUEST_0_DESC0']=$padata['L_BILLINGAGREEMENTDESCRIPTION0']。 “$”.$product->price.“/月”
$padata['PAYMENTREQUEST\u 0\u NOTIFYURL']='http://site_url/paypal/ipn'; $padata['PAYMENTREQUEST\u 0\u DESC']=$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']=“销售”； $padata['PAYMENTREQUEST\u 0\u ITEMAMT']=$product->price
$padata['PAYMENTREQUEST\u 0\u AMT']=$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']=“第二个产品名称”
$hosteddata['L_PAYMENTREQUEST_0_DESC1']=“第二个产品说明”
$hosteddata['L_PAYMENTREQUEST_0_NUMBER1']=$secondproduct->id
$hosteddata['L_PAYMENTREQUEST_0_QTY1']='1'
$hosteddata['L_PAYMENTREQUEST_0_AMT1']=$secondproduct->price； $paypal\u data=http\u build\u query（$padata）； $httpParsedResponseAr=$this->PPHttpPost（'SetExpressCheckout'，$paypal_data）； //根据我们从贝宝收到的信息回复 if（“SUCCESS”==strotupper（$httpParsedResponseAr[“ACK”]）| |“SUCCESSWITHWARNING”==strotupper（$httpParsedResponseAr[“ACK”]））{ //将用户重定向到收到令牌的PayPal商店。 $paypalurl=https://www.paypal.com/cgi-bin/webscr?cmd=_express-签出和令牌=“.$httpParsedResponseAr[“令牌”]”； 标题（'Location:'。$paypalurl）； }否则{ echo“Error:”.urldecode（$httpParsedResponseAr[“L_LONGMESSAGE0”]）。”；
} 返回URL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);
$hosteddata['L_BILLINGAGREEMENTDESCRIPTION0']=“定期描述”
$hosteddata['L_BILLINGAGREEMENTDESCRIPTION0']=$hosteddata['L_BILLINGAGREEMENTDESCRIPTION0'].$$公关->价格。'/月'
$hosteddata['L_PAYMENTREQUEST_0_NAME0']=$pr->name
$hosteddata['PROFILEREFERENCE']=$GetExpressCheckoutDetails['L_PAYMENTREQUEST_0_NUMBER0']
$hosteddata['PROFILESTARTDATE']=日期（'Y-m-d'）。'T’。日期（'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\u 0\u NOTIFYURL']='http://site_url/paypal/ipn';
$padata['L_PAYMENTREQUEST_0_NAME1']=“第二个产品名称”； $hosteddata['L_PAYMENTREQUEST_0_DESC1']=“第二个产品说明”
$hosteddata['L_PAYMENTREQUEST_0_NUMBER1']=$secondproduct->id
$hosteddata['L_PAYMENTREQUEST_0_QTY1']='1'
$hosteddata['L_PAYMENTREQUEST_0_AMT1']=$secondproduct->price； $paypal\u data=http\u build\u query（$ho） 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;
}