修改试用期或为现有Paypal订阅添加第二个试用期

我正在尝试修改现有Paypal订阅的试用期。然而，似乎a1、p1和t1值总是被忽略。使用a3、p3和t3更改总和和周期确实有效（IPN通知也正在发送）

我还尝试添加第二个试用期（同时在第一个试用期保持相同的值），但这也不起作用

我已经阅读了Paypal的文档，但是我找不到任何关于修改试用期的内容。这可能吗？我错过了什么

以下是我的示例代码：

<form action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post" target="_top">

    <!-- Identify your business so that you can collect the payments. -->
    <input type="hidden" name="business" value="XXXXX">

    <!-- Specify a Subscribe button. -->
    <input type="hidden" name="cmd" value="_xclick-subscriptions">

    <!-- Identify the subscription. -->
    <input type="hidden" name="item_name" value="Item Name">

    <!-- Set the revised subscription price and terms. -->
    <input type="hidden" name="currency_code" value="EUR">

    <input type="hidden" name="a1" value="1">
    <input type="hidden" name="p1" value="78">
    <input type="hidden" name="t1" value="D">

    <input type="hidden" name="a3" value="90.88">
    <input type="hidden" name="p3" value="1">
    <input type="hidden" name="t3" value="Y">

    <!-- Set recurring payments until canceled. -->
    <input type="hidden" name="src" value="1">

    <!-- Let current subscribers modify only. -->
    <input type="hidden" name="modify" value="2">

    <input name="custom" value="user access token" type="hidden" />

    <input type="hidden" name="notify_url" value="http://..." />
    <input type="hidden" name="cancel_return" value="http://..." />
    <input type="hidden" name="return" value="http://..." />

    <input type="hidden" name="email" value="user email" />

    <!-- Display the payment button. -->
    <input type="image" src="https://www.paypalobjects.com/en_US/GB/i/btn/btn_subscribeCC_LG.gif" border="0" name="submit" alt="PayPal – The safer, easier way to pay online.">
    <img alt="" border="0" src="https://www.paypalobjects.com/en_GB/i/scr/pixel.gif" width="1" height="1">

</form>

---

您必须使用paypal express签出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

要创建定期概要文件，请遵循以下（PHP）示例：

// 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"]).'';
} //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
$paypal\u data=http\u build\u query（$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”]）。”；
} 页面返回URL:

$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);
$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';
$paypal\u data=http\u build\u query（$hosteddata）； $hosted_saas_response=$this->PPHttpPost（'CreateRecurringPaymentsProfile'，$paypal_data）
我使用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 $httpParsedResponseAr;
} 私有函数PPHttpPost（$methodName，$nvpStr）{
$api_username='1yourpaypal@email.com'; $api_password='qweqweqeqweqweqwe'；
$api_签名='wqeqweqweqweqweqweqweqweqwe.cT'；
$api_endpoint='https://api-3t.paypal.com/nvp“；
$version='124.0'； $ch=curl\u init（）；
curl\u setopt（$ch，CURLOPT\u URL，$api\u endpoint）；
curl\u setopt（$ch，CURLOPT\u VERBOSE，1）；
curl\u setopt（$ch，CURLOPT\u SSL\u VERIFYPEER，FALSE）；
curl\u setopt（$ch，CURLOPT\u SSL\u VERIFYHOST，FALSE）；
curl_setopt（$ch，CURLOPT_POST，1）；
$nvpreq=“METHOD=$methodName\u&VERSION=$VERSION&PWD=$api\u password&USER=$api\u username&SIGNATURE=$api\u SIGNATURE&$nvpStr”；
curl_setopt（$ch，CURLOPT_POSTFIELDS，$nvpreq）；
$htt