IPN模拟器运行良好，但沙箱检出不要调用notify_url

Question

我无法将PayPal的IPN集成到我的系统中。在IPN Simulator中，我的侦听器工作正常，但是当我测试沙箱时，PayPal不会访问该文件以通知我对请求的更改。

结帐工作正常，但PayPal未调用我的listener.php。

我什至在文件中故意留有错误，如果执行该文件，则会接收日志。即便如此，什么也没发生，所以当某些请求发生更改时，PayPal似乎没有发送信息

listener.php：

    <?php 
    include "../../includes/functions/functions.php";
    $raw_post_data = file_get_contents('php://input');
    file_put_contents("Data.txt", $raw_post_data);
    $raw_post_array = explode('&', $raw_post_data);
    $myPost = array();
    foreach ($raw_post_array as $keyval) {
        $keyval = explode('=', $keyval);
        if (count($keyval) == 2)
            $myPost[$keyval[0]] = urldecode($keyval[1]);
    }
    $req = 'cmd=_notify-validate';
    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";
    }
    $ch = curl_init('https://ipnpb.sandbox.paypal.com/cgi-bin/webscr');
    curl_setopt($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_SSL_VERIFYPEER, 1);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
    curl_setopt($ch, CURLOPT_FORBID_REUSE, 1);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('Connection: Close'));

    if (!($res = curl_exec($ch))) {
        // error_log("Got " . curl_error($ch) . " when processing IPN data");
        curl_close($ch);
        exit;
    }
    curl_close($ch);
    if (strcmp($res, "VERIFIED") == 0) {

        file_put_contents("Data.txt", "OK");

        }
    }
    ?>

表格

<form id="paypal<?= $pacoteData->pacotes_id ?>" action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post">
                    <!--Tipo do botão-->
                    <input type="hidden" name="cmd" value="_xclick" />

                    <!--Vendedor e URL de retorno, cancelamento e notificação-->
                    <input type="hidden" name="business" value="jorge.frillocchi-facilitator@gmail.com" />
                    <input type="hidden" name="return" value="<?= $config->PROTOCOL ?><?= $config->URL ?>?payment=success&pedido=<?= $codigo_pedido ?>" />
                    <input type="hidden" name="cancel" value="<?= $config->PROTOCOL ?><?= $config->URL ?>" />
                    <input type="hidden" name="notify_url" value="<?= $config->PROTOCOL ?><?= $config->URL ?>>modules/pagamento/notificacao.php" />

                    <!--Internacionalização e localização da página de pagamento-->
                    <input type="hidden" name="charset" value="utf-8" />
                    <input type="hidden" name="lc" value="BR" />
                    <input type="hidden" name="country_code" value="BR" />
                    <input type="hidden" name="currency_code" value="BRL" />

                    <!--Informações sobre o produto e seu valor-->
                    <input type="hidden" name="amount" value="<?= number_format($pacoteData->pacotes_valor, 2, ".", ",") ?>" />
                    <input type="hidden" name="item_name" value="<?= $pacoteData->pacotes_nome . " " . $pacoteData->pacotes_duracao ?> Dias" />
                    <input type="hidden" name="quantity" value="1" />
                    <input type="hidden" name="invoice" value="<?= $codigo_pedido ?>" />

                    <!--Botão para submissão do formulário-->
                    <button type="submit" class="mdc-button mdc-card__action mdc-card__action--button">
                        <i class="material-icons mdc-button__icon" aria-hidden="true">payment</i>
                        <span class="mdc-button__label">Assinar com PayPal</span>
                    </button>
                </form>