Php 贝宝IPN不断回归'；无效'；代码，不管我做什么

我知道这个问题已经被问过很多次了，但是通过查看所有的解决方案，没有一个对我有效。 我一直在使用PayPal网站上的IPN模拟器将订阅集成到我的网站中，但IPN总是返回无效。 我尝试了多种方法来实现这一点，但这是我目前的方法：

<?php
class IpnListener {


public $use_curl = true;     
public $force_ssl_v3 = false;  
public $follow_location = false;     
public $use_ssl = true;      
public $use_sandbox = false; 
public $timeout = 30;       

private $post_data = array();
private $post_uri = '';     
private $response_status = '';
private $response = '';
const PAYPAL_HOST = 'www.paypal.com';
const SANDBOX_HOST = 'www.sandbox.paypal.com';

protected function curlPost($encoded_data) {
    if ($this->use_ssl) {
        $uri = 'https://'.$this->getPaypalHost().'/cgi-bin/webscr';
        $this->post_uri = $uri;
    } else {
        $uri = 'http://'.$this->getPaypalHost().'/cgi-bin/webscr';
        $this->post_uri = $uri;
    }

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
    curl_setopt($ch, CURLOPT_CAINFO, dirname(__FILE__)."/cacert.pem");
    curl_setopt($ch, CURLOPT_URL, $uri);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $encoded_data);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, $this->follow_location);
    curl_setopt($ch, CURLOPT_TIMEOUT, $this->timeout);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HEADER, true);

    if ($this->force_ssl_v3) {
        curl_setopt($ch, CURLOPT_SSLVERSION, 3);
    } else {
        curl_setopt($ch, CURLOPT_SSLVERSION, 4);
    }

    $this->response = curl_exec($ch);
    $this->response_status = strval(curl_getinfo($ch, CURLINFO_HTTP_CODE));

    if ($this->response === false || $this->response_status == '0') {
        $errno = curl_errno($ch);
        $errstr = curl_error($ch);
        throw new Exception("cURL error: [$errno] $errstr");
    }
}

protected function fsockPost($encoded_data) {

    if ($this->use_ssl) {
        $uri = 'ssl://'.$this->getPaypalHost();
        $port = '443';
        $this->post_uri = $uri.'/cgi-bin/webscr';
    } else {
        $uri = $this->getPaypalHost(); // no "http://" in call to fsockopen()
        $port = '80';
        $this->post_uri = 'http://'.$uri.'/cgi-bin/webscr';
    }
    $fp = fsockopen($uri, $port, $errno, $errstr, $this->timeout);

    if (!$fp) { 
        // fsockopen error
        throw new Exception("fsockopen error: [$errno] $errstr");
    } 
    $header = "POST /cgi-bin/webscr HTTP/1.1\r\n";
    $header .= "Host: ".$this->getPaypalHost()."\r\n";
    $header .= "Content-Type: application/x-www-form-urlencoded\r\n";
    $header .= "Content-Length: ".strlen($encoded_data)."\r\n";
    $header .= "Connection: Close\r\n\r\n";

    fputs($fp, $header.$encoded_data."\r\n\r\n");

    while(!feof($fp)) { 
        if (empty($this->response)) {
            // extract HTTP status from first line
            $this->response .= $status = fgets($fp, 1024); 
            $this->response_status = trim(substr($status, 9, 4));
        } else {
            $this->response .= fgets($fp, 1024); 
        }
    } 

    fclose($fp);
}

private function getPaypalHost() {
    if ($this->use_sandbox) return self::SANDBOX_HOST;
    else return self::PAYPAL_HOST;
}

public function getPostUri() {
    return $this->post_uri;
}

public function getResponse() {
    return $this->response;
}

public function getResponseStatus() {
    return $this->response_status;
}

public function getTextReport() {

    $r = '';

    // date and POST url
    for ($i=0; $i<80; $i++) { $r .= '-'; }
    $r .= "\n[".date('m/d/Y g:i A').'] - '.$this->getPostUri();
    if ($this->use_curl) $r .= " (curl)\n";
    else $r .= " (fsockopen)\n";

    // HTTP Response
    for ($i=0; $i<80; $i++) { $r .= '-'; }
    $r .= "\n{$this->getResponse()}\n";

    // POST vars
    for ($i=0; $i<80; $i++) { $r .= '-'; }
    $r .= "\n";

    foreach ($this->post_data as $key => $value) {
        $r .= str_pad($key, 25)."$value\n";
    }
    $r .= "\n\n";

    return $r;
}

public function processIpn($post_data=null) {
    $encoded_data = 'cmd=_notify-validate';

    if ($post_data === null) { 
        // use raw POST data 
        if (!empty($_POST)) {
            $this->post_data = $_POST;
            $encoded_data .= '&'.file_get_contents('php://input');
        } else {
            throw new Exception("No POST data found.");
        }
    } else { 
        // use provided data array
        $this->post_data = $post_data;

        foreach ($this->post_data as $key => $value) {
            $encoded_data .= "&$key=".urlencode($value);
        }
    }
    if ($this->use_curl) $this->curlPost($encoded_data); 
    else $this->fsockPost($encoded_data);

    if (strpos($this->response_status, '200') === false) {
        throw new Exception("Invalid response status: ".$this->response_status);
    }

    if (strpos($this->response, "VERIFIED") !== false) {
        return true;
    } elseif (strpos($this->response, "INVALID") !== false) {
        return false;
    } else {
        throw new Exception("Unexpected response from PayPal.");
    }
}

public function requirePostMethod() {
    // require POST requests
    if ($_SERVER['REQUEST_METHOD'] && $_SERVER['REQUEST_METHOD'] != 'POST') {
        header('Allow: POST', true, 405);
        throw new Exception("Invalid HTTP request method.");
    }
}

---

原来我使用的代码很好，我更新了服务器一点，以确保它使用的是最新的cURL和open ssl，但即使如此，沙盒仍然会返回无效。我尝试了订阅价格为0.01美元的实时版本，付款通过，是有效的，我的数据库也更新了

IPN模拟器/sandbox肯定有点奇怪原来我使用的代码很好，我更新了服务器一点，以确保它使用的是最新的cURL和open ssl，但即使如此，沙盒仍然会返回无效。我尝试了订阅价格为0.01美元的实时版本，付款通过，是有效的，我的数据库也更新了

IPN模拟器/沙盒一定有点奇怪
你尝试过的多种方法是什么？@MasterDJon我尝试过使用他们在开发人员网站和GitHub页面上提供的代码，但都没有用。它们都类似于这个代码，但是，我不明白为什么它不起作用。你能提供你所有的信息吗？例如，此网站/GitHub。任何能帮助像我这样的人的事都可以帮助你。你越清楚，你得到答案的速度就越快。@Masterdj在PayPal开发者链接上是这样的，他们在这里链接到他们的GitHub：我也尝试了他们建议首先做的事情，使用PayPal网站示例从头开始做一个测试。没有修改，或者只有很少的修改，然后告诉我这是否有效。您尝试过的多种方法是什么？@MasterDJon我尝试过使用他们在开发人员网站和GitHub页面上提供的代码，但都没有用。它们都类似于这个代码，但是，我不明白为什么它不起作用。你能提供你所有的信息吗？例如，此网站/GitHub。任何能帮助像我这样的人的事都可以帮助你。你越清楚，你得到答案的速度就越快。@Masterdj在PayPal开发者链接上是这样的，他们在这里链接到他们的GitHub：我也尝试了他们建议首先做的事情，使用PayPal网站示例从头开始做一个测试。没有修改，或者最小修改，然后告诉我这是否有效。
/*The Database Connection Code Is Here*/
include('ipnlistener.php');

$listener = new IpnListener();
$listener->use_sandbox = true;
//$listener->use_curl = false;

try {
    $verified = $listener->processIpn();
} catch (Exception $e) {
    file_put_contents("paymentdev.php", $e->getMessage()." ".date("H:i"));
    //file_put_contents("paymentdev.php", "fudge");
    exit(0);
}

if ($verified) {

    file_put_contents("paymentdev.php", "test");

    $data = $_POST;
    $user_id = json_decode($data['custom'])->user_id;

    $subscription = ($data['mc_gross_1'] == '49.95') ? 2 : 1;

    $txn_id = $data['txn_id'];
    $user_id = $user_id;
    $paypal_id = $data['subsc_id'];
    $subscription = $subscription;
    $expires = date('Y-m-d H:i:s', strtotime('+1 Month'));

    $sql = "SELECT * FROM payments WHERE user_id=$user_id";
    $payment = $mysqli->query($sql);

    if(isset($payment) && $payment->num_rows > 0)
    {
        $sql = "DELETE FROM payments WHERE user_id=$user_id";
        $delete = $mysqli->query($sql);
    }

    $sql = "INSERT INTO payments (txn_id, user_id, paypal_id, expires, subscription) VALUES ('$txn_id', $user_id, '$paypal_id', '$expires', $subscription)";
    $insertpayment = $mysqli->query($sql);

    file_put_contents("paymentdev.php", $mysqli->error);

} else {

    file_put_contents("paymentdev.php", "Transaction not verified ".date("H:i")."<br>".$listener->getTextReport());

    echo "Error: Transaction not verified";

}