为什么我运行订阅表格时Paypal出现错误？

Question

我从未能够成功在我的网站上成功设置重复的贝宝订阅按钮，因为贝宝总是给我错误， Paypal cannot process this transaction because of a problem with the seller's website. 我已经在本地和IPN模拟器中测试了脚本，并且一切正常。 但是，每当我尝试在沙盒模式下进行测试时，都会出现此错误。 我的代码或Paypal帐户有问题吗？ 我正在尝试在wordpress中进行设置。

这是我的表格：

if(get_option('jz_payment_environment') == 'local'){
    $form_action = site_url('gateway/paypal');
} else if(get_option('jz_payment_environment') == 'sandbox'){
    $form_action = 'https://www.sandbox.paypal.com/cgi-bin/webscr';
} else if(get_option('jz_payment_environment') == 'production'){
    $form_action = 'https://ipnpb.paypal.com/cgi-bin/webscr';
}?>
<form action="<?php echo $form_action;?>" method="post" target="_top">
<input type="hidden" name="cmd" value="_s-xclick">
<input type="hidden" name="hosted_button_id" value="">
<input type="hidden" name="custom" value="<?php echo get_current_user_id();?>">
<input type="hidden" name="business" value="<?php echo get_option('jz_paypal_email');?>">
<?php if(get_option('jz_payment_environment') == 'local'):?>
<input type="hidden" name="t3" value="M">
<input type="hidden" name="p3" value="1">
<input type="hidden" name="src" value="1">
<input type="hidden" name="srt" value="52">
<input type="hidden" name="currency_code" value="USD">
<?php endif;?>

这是我的IPN简码：

public static function paypal_ipn(){
        global $wpdb;
        ob_start();
        if($_SERVER['REQUEST_METHOD'] == 'POST'){
            $ipn = new PaypalIPN();
            if(get_option('jz_payment_environment') == 'sandbox'){
                $ipn->useSandbox();
                $verified = $ipn->verifyIPN();
            } else if(get_option('jz_payment_environment') == 'local'){
                $verified = true;
            } else if(get_option('jz_payment_environment') == 'production'){
                $ipn->usePHPCerts();
                $verified = $ipn->verifyIPN();
            }
            if($verified){

               $payment = array(
                   'post_author' => $_POST['custom'],
                   'post_type' => 'payment',
                   'post_status' => 'publish',
                   'meta_input' => array(
                       'payment_amount' => $_POST['a3'],
                       'payment_expiration' => ($_POST['t3'] == 'M') ? time() + (60 * 60 * 24 * 30 * $_POST['p3']) : time() + (60 * 60 * 24 * 365),
                       'payment_currency' => $_POST['currency_code'],
                       'payment_status' => 'pending',
                       'payment_tpt_no' => (!empty($_POST['txn_id'])) ? $_POST['txn_id'] : 'N/A'
                   )
               );
               $payment_post = wp_insert_post($payment);
               if(!is_wp_error($payment_post)){
                   $subscriber = get_userdata($_POST['custom']);
                   if($subscriber){
                       update_user_meta($subscriber, 'subscription_expiration', $payment['meta_input']['payment_expiration']);
                       $plan = $wpdb->get_row("
                           SELECT p.ID, pm1.meta_value as plan_monthly, pm2.meta_value as plan_quarterly, pm3.meta_value as plan_yearly
                           FROM {$wpdb->prefix}posts AS p
                           LEFT JOIN {$wpdb->prefix}postmeta AS pm1 ON p.ID = pm1.post_id AND pm1.meta_key = 'plan_monthly'
                           LEFT JOIN {$wpdb->prefix}postmeta AS pm2 ON p.ID = pm2.post_id AND pm2.meta_key = 'plan_quarterly'
                           LEFT JOIN {$wpdb->prefix}postmeta AS pm3 ON p.ID = pm3.post_id AND pm3.meta_key = 'plan_yearly'
                           WHERE post_type = 'plan'
                               AND pm1.meta_value = '{$_POST['a3']}'
                               OR pm2.meta_value = '{$_POST['a3']}'
                               OR pm3.meta_value = {$_POST['a3']}
                           LIMIT 1
                           ");
                       update_user_meta($subscriber, 'subscription_plan', $plan->ID);
                   }
               }
            }
        }
        header("HTTP/1.1 200 OK");
        $out = ob_get_contents();
        ob_end_clean();
        return $out;
    }

这是我在Paypal开发人员网站上使用的Paypal IPN类：

<?php
class PaypalIPN
{
    /** @var bool Indicates if the sandbox endpoint is used. */
    private $use_sandbox = false;
    /** @var bool Indicates if the local certificates are used. */
    private $use_local_certs = true;
    /** Production Postback URL */
    const VERIFY_URI = 'https://www.paypal.com/cgi-bin/webscr';
    /** Sandbox Postback URL */
    const SANDBOX_VERIFY_URI = 'https://www.sandbox.paypal.com/cgi-bin/webscr';
    /** Response from PayPal indicating validation was successful */
    const VALID = 'VERIFIED';
    /** Response from PayPal indicating validation failed */
    const INVALID = 'INVALID';
    const RESULT = '';
    /**
     * Sets the IPN verification to sandbox mode (for use when testing,
     * should not be enabled in production).
     * @return void
     */
    public function useSandbox()
    {
        $this->use_sandbox = true;
    }
    /**
     * Sets curl to use php curl's built in certs (may be required in some
     * environments).
     * @return void
     */
    public function usePHPCerts()
    {
        $this->use_local_certs = false;
    }
    /**
     * Determine endpoint to post the verification data to.
     *
     * @return string
     */

    public function getResult(){
        return self::RESULT;
    }
    public function getPaypalUri()
    {
        if ($this->use_sandbox) {
            return self::SANDBOX_VERIFY_URI;
        } else {
            return self::VERIFY_URI;
        }
    }
    /**
     * Verification Function
     * Sends the incoming post data back to PayPal using the cURL library.
     *
     * @return bool
     * @throws Exception
     */
    public function verifyIPN()
    {
        if ( ! count($_POST)) {
            throw new Exception("Missing POST Data");
        }
        $raw_post_data = file_get_contents('php://input');
        $raw_post_array = explode('&', $raw_post_data);
        $myPost = array();
        foreach ($raw_post_array as $keyval) {
            $keyval = explode('=', $keyval);
            if (count($keyval) == 2) {
                // Since we do not want the plus in the datetime string to be encoded to a space, we manually encode it.
                if ($keyval[0] === 'payment_date') {
                    if (substr_count($keyval[1], '+') === 1) {
                        $keyval[1] = str_replace('+', '%2B', $keyval[1]);
                    }
                }
                $myPost[$keyval[0]] = urldecode($keyval[1]);
            }
        }
        // Build the body of the verification post request, adding the _notify-validate command.
        $req = 'cmd=_notify-validate';
        $get_magic_quotes_exists = false;
        if (function_exists('get_magic_quotes_gpc')) {
            $get_magic_quotes_exists = true;
        }
        foreach ($myPost as $key => $value) {
            if ($get_magic_quotes_exists == true && get_magic_quotes_gpc() == 1) {
                $value = urlencode(stripslashes($value));
            } else {
                $value = urlencode($value);
            }
            $req .= "&$key=$value";
        }
        // Post the data back to PayPal, using curl. Throw exceptions if errors occur.
        $ch = curl_init($this->getPaypalUri());
        curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
        curl_setopt($ch, CURLOPT_SSLVERSION, 6);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
        // This is often required if the server is missing a global cert bundle, or is using an outdated one.
        if ($this->use_local_certs) {
            curl_setopt($ch, CURLOPT_CAINFO, 'W:/laragon/etc/ssl/cacert.pem');
        }
        curl_setopt($ch, CURLOPT_FORBID_REUSE, 1);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array(
            'User-Agent: PHP-IPN-Verification-Script',
            'Connection: Close',
        ));
        if ( ! ($res = curl_exec($ch))) {
            $errno = curl_errno($ch);
            $errstr = curl_error($ch);
            curl_close($ch);
            throw new Exception("cURL error: [$errno] $errstr");
        }
        $info = curl_getinfo($ch);
        $http_code = $info['http_code'];
        if ($http_code != 200) {
            throw new Exception("PayPal responded with http code $http_code");
        }
        curl_close($ch);
        // Check if PayPal verifies the IPN data, and if so, return true.
        if ($res == self::VALID) {
            return true;
        } else {
            return false;
        }
    }
}

当用户单击单选按钮时，hosted_button_id隐藏的输入将使用JS进行更改。 如果要测试我的表格，请单击此处 。 我究竟做错了什么？

Answer 1

如我所见，您的hosted_button_id参数为空。 考虑删除它？

但是，如果以后被填满：贝宝明确声明您不能更改托管按钮上的交易金额：

您不应为已保存的按钮编写HTML按钮代码。 始终使用贝宝生成的代码。 但是，您可以通过添加不影响交易金额的隐藏HTML变量来增强已保存按钮的生成代码。 例如，您可以使用自动填充变量来增强已保存的按钮。

来源： https ： //developer.paypal.com/docs/classic/paypal-payments-standard/integration-guide/formbasics/#using-html-variables-with-saved-payment-buttons

Answer 2

如果要更改值，请不要使用托管按钮。 使用未托管的按钮。 在PayPal上创建一个新的示例按钮，在步骤2中取消选中“保存”按钮的选项，并在生成代码后单击以删除代码保护。 然后，您将可以使用动态代码进行更改。