如何测试Paypal实时服务器以确保实时监听器正常工作？

Question

我有以下侦听器代码，并且所有内容都在沙盒模式下工作，但不确定要使它在实时模式下工作必须进行哪些更改

在paypal网站上，我将不得不用实时URL替换该URL，并告诉用户包括Receiver_email？既然我们处理的是真钱，我只想确保它可以在实时服务器上平稳运行。我也看过其他一些有关如何添加捐赠按钮的视频，但这不需要听众。我只是想知道为什么吗？

<?php

 if ($_SERVER['REQUEST_METHOD'] != 'POST') {
    header("Location: index.php");
    exit();
 }

 $ch = curl_init();
 curl_setopt($ch, CURLOPT_URL, 'https://ipnpb.sandbox.paypal.com/cgi-bin/webscr');
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
 curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
 curl_setopt($ch, CURLOPT_POST, 1);
 curl_setopt($ch, CURLOPT_POSTFIELDS, "cmd=_notify-validate&" . http_build_query($_POST));
 $response = curl_exec($ch);
 curl_close($ch);

if ($response == 'VERIFIED' && $_POST['receiver_email'] == 'piano0011@pianocourse101.com') {
    $cEmail = $_POST['payer_email'];
    $name = $_POST['first_name']." ".$_POST['last_name'];

    $price = $_POST['mc_gross'];
    $currency = $_POST['mc_currency'];
    $item = $_POST['item_number'];
    $paymentStatus = $_POST['payment_status'];

    if ($item == "subscriptionplan" && $currency == "USD" && $paymentStatus == "Completed" && $price == 100) {

        $sql = "SELECT * FROM memberships WHERE user_email = ?;";
        $paid = 1;
        $stmt = mysqli_stmt_init($conn);

                if(!mysqli_stmt_prepare($stmt, $sql)) {
                       echo "SQL error";
                    } else {
                      mysqli_stmt_bind_param($stmt, "s", $cEmail);
                      mysqli_stmt_execute($stmt);
                      $result = mysqli_stmt_get_result($stmt);
                      $resultCheck = mysqli_num_rows($result);
                      if ($resultCheck < 1) {
                         header("Location: header2.php?listener=noaccount");
                         exit();
                      } else {
                        $sql2 = "UPDATE memberships
                                 SET paid = ?
                                 WHERE user_email = ?
                                ;";

                        $stmt = mysqli_stmt_init($conn);

                if(!mysqli_stmt_prepare($stmt, $sql2)) {
                       echo "SQL error";
                    } else {
                      mysqli_stmt_bind_param($stmt, "is", $paid, $cEmail);
                      mysqli_stmt_execute($stmt);

                         $to = $cEmail;

                                    //sender
                                    $from = 'pianocourse101@hotmail.com';
                                    $fromName = 'PianoCourse101';

                                    //email subject
                                    $subject = 'Thank you for purchasing one of our subscriptionplans!'; 

                                    //attachment file path
                                    $file = "codexworld.pdf";

                                    //email body content
                                    $htmlContent = "<h1>Thank you for purchasing one of our subscriptionplans!!</h1>
                                        <p>Dear ".$name.", \n\nThank you for purchasing one of our subscriptionplans!\n\nYou can now access your lessons via the members' section. You are also welcome to download the contents for your own personal learning</p>"

                                    //header for sender info
                                    $headers = "From: $fromName"." <".$from.">";

                                    //boundary 
                                    $semi_rand = md5(time()); 
                                    $mime_boundary = "==Multipart_Boundary_x{$semi_rand}x"; 

                                    //headers for attachment 
                                    $headers .= "\nMIME-Version: 1.0\n" . "Content-Type: multipart/mixed;\n" . " boundary=\"{$mime_boundary}\""; 

                                    //multipart boundary 
                                    $message = "--{$mime_boundary}\n" . "Content-Type: text/html; charset=\"UTF-8\"\n" .
                                    "Content-Transfer-Encoding: 7bit\n\n" . $htmlContent . "\n\n"; 

                                    //preparing attachment
                                    if(!empty($file) > 0){
                                        if(is_file($file)){
                                            $message .= "--{$mime_boundary}\n";
                                            $fp =    @fopen($file,"rb");
                                            $data =  @fread($fp,filesize($file));

                                            @fclose($fp);
                                            $data = chunk_split(base64_encode($data));
                                            $message .= "Content-Type: application/octet-stream; name=\"".basename($file)."\"\n" . 
                                            "Content-Description: ".basename($file)."\n" .
                                            "Content-Disposition: attachment;\n" . " filename=\"".basename($file)."\"; size=".filesize($file).";\n" . 
                                            "Content-Transfer-Encoding: base64\n\n" . $data . "\n\n";
                                        }
                                    }
                                    $message .= "--{$mime_boundary}--";
                                    $returnpath = "-f" . $from;

                                    //send email
                                    $mail = @mail($to, $subject, $message, $headers, $returnpath); 

                                    //email sending status
                                    echo $mail?"<h1>Mail sent.</h1>":"<h1>Mail sending failed.</h1>";

}

    } else {
        header("Location: update.php?listener=notmatchinginformation");
        exit();
    }
}