Php 如何集成贝宝快捷结账？

我正在开发一个wordpress插件，它需要PayPal Express的结账功能

我在paypal网站上关注这篇关于如何集成上下文内签出功能（）的文章，这篇文章在第一步中给出了以下形式

<form method=post action=https://api-3t.sandbox.paypal.com/nvp>
    <input type=hidden name=USER value=API_username>
    <input type=hidden name=PWD value=API_password>
    <input type=hidden name=SIGNATURE value=API_signature>
    <input type=hidden name=VERSION value=XX.0>
    <input type=hidden name=PAYMENTREQUEST_0_PAYMENTACTION value=Sale>
    <input name=PAYMENTREQUEST_0_AMT value=19.95>
    <input type=hidden name=RETURNURL value=https://www.YourReturnURL.com>
    <input type=hidden name=CANCELURL value=https://www.YourCancelURL.com>
    <input type=submit name=METHOD value=SetExpressCheckout>
</form>

---

由于这个原因，我无法进入PayPal文档的第2步，所以这里需要帮助。我做错了什么？

要实现PayPal Express签出，您需要执行一些服务器端代码（PHP、ASP.Net等）。您试图做的是一个无法工作的HTML表单。 您必须执行3个API调用来验证全额付款

• GetExpressCheckoutDetails

---

在每次调用中，您都将使用您的API凭据。

尝试我在项目中使用的代码，它可以正常工作

PHP:

HTML:

---

我建议实现PayPal Express签出API

使用这种方法来代替创建wordpress插件有很多好处。主要原因是响应将立即传递，并且您不会使用IPN方法来检查事务是否成功。您还可以在一个会话中添加多个定期和一次性付款，包括税费和福利。你将有自由添加所有这些东西，几乎所有的东西-这是你的wordpress插件需要酷

这正是我们的建议。下面是一个简单的（PHP）示例，说明如何设置多个产品的交易（也包括定期付款）：

//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”]）。”；

}
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';

$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；
$paypal\u data=http\u build\u query（$hosteddata）；
$hosted_saas_response=$this->PPHttpPost（'CreateRecurringPaymentsProfile'，$paypal_data）

我使用了单独的冰毒
$paypal_url='https://www.paypal.com/cgi-bin/webscr'; 
$paypal_id='example@example.com';

<form action='<?php echo $paypal_url; ?>' method='post' name='frmPayPal1'>
    <input type='hidden' name='business' value='<?php echo $paypal_id;?>'>
    <input type='hidden' name='cmd' value='_xclick'>
    <input type='hidden' name='item_name' value='Products Total'>
    <input type='hidden' name='amount' value='<?php echo $tot;?>'>
    <input type='hidden' name='no_shipping' value='1'>
    <input type='hidden' name='currency_code' value='USD'>
    <input type='hidden' name='handling' value='0'>
    <input type='hidden' name='cancel_return' value='http://localhost/paypal/cancel.php'>
    <input type='hidden' name='return' value='http://localhost/paypal/success.php'>
    <input type="image" src="https://www.sandbox.paypal.com/en_US/i/btn/btn_buynowCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
    <img alt="" border="0" src="https://www.sandbox.paypal.com/en_US/i/scr/pixel.gif" width="1" height="1">
</form>

// 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"]).'';


}
$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);

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;

}