Php 如何处理；504网关超时“；在Opencart模块中

我通过将Opencart的订单发送到我的CRM来编写模块。但在本例中，我通过post.add设置了事件，但不正常，因为当客户刷新他们的购物车时，我的订单仍在CRM中添加，因此我得到了重复的相同订单。我决定设置post.order.history.add事件，但在本例中，我有504网关超时。在这种情况下我能做什么？ 请注意，我的CRM和店铺在同一VPS上

这是我的模块：

}

public function check_phone($number)
{
    //bla bla bla
    $retunr $number;
}

public function on_order_add($order_id)
{
    $this->load->model('checkout/order');
    $value = $this->model_checkout_order->getOrder($order_id);

    //prepare loggin
    $url_login = "*********/login/enter/";
    $login = array();
    $login["username"] = "username";
    $login["password"] = "password";
    $login["remember"] = "on";
    $login["act"] = "act";
    //login
    $curl = curl_init($url_login);
    curl_setopt($curl, CURLOPT_POST, true);
    curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($login));
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($curl, CURLOPT_COOKIEJAR, "cookie.txt");
    curl_setopt($curl, CURLOPT_COOKIEFILE, "cookie.txt"); //saved cookies
    curl_setopt($curl, CURLOPT_USERAGENT,

        'Mozilla/5.0 (Windows NT 6.1; rv:11.0) Gecko/20100101 Firefox/11.0');
    $response = (curl_exec($curl));
    curl_close($curl);

    //prepare order
    $orders = array();
    $order_id = $order_id;
    $url = "******/orders/api/";


    $orders["act"] = "add_packaging_order";
    //ORDER
    $orders["id_user_add"] = 21; //system by default
    $orders["date_calendar"] = date("Y-m-d");
    $orders["timepicker"] = date("H:i:s");

    if ($value["payment_code"] == "cod" || $value["payment_code"] == "cheque")
        $orders["inlineRadioOptions"] = "cash"; // НАЛ ИЛИ БЕЗНАЛ
    else
        $orders["inlineRadioOptions"] = "cashless";

    if (stristr($value["email"], 'localhost') !== false)
        $value["email"] = " Не указано\n";


    $orders["status"] = 1;
    //ORDER_END

    //auto
    if ($value["shipping_code"] == "flat.flat") {
        $orders["show_next_auto"] = "on";
        $orders["autoname"] = "Для доставки упаковки за 99грн";
        $orders["summary_auto"] = 1;
        $orders["price_auto_agree"] = 0;
    }
    if ($value["shipping_code"] == "free.free") {
        $orders["show_next_auto"] = "on";
        $orders["autoname"] = "Для бесплатной доставки упаковки";
        $orders["summary_auto"] = 1;
        $orders["price_auto_agree"] = 0;
    }
    //end auto


    //start clients
    $orders["name_clients[]"] = $value["lastname"] . " " . $value["firstname"];
    $orders["sendsms"] = 0;
    $orders["signature"] = "=======";
    $orders["number_order"] = $order_id;
    $orders["phones[]"] = $this->check_phone($value["telephone"]);


    //end clients
    $custom_fields = "";
    //address
    if (isset($value["custom_field"]))
        $custom_data = ($value["custom_field"]);
    if (isset($custom_data[17]))
        $orders["company_name"] = $custom_data[17];

    if (isset($custom_data[4]))
        $orders["addres[]"] = $custom_data[4];
    else
        if (isset($custom_data[8]) || isset($custom_data[9]) || isset($custom_data[12])) {
            $orders["addres[]"] = $custom_data[8] . ", " . $custom_data[9] . "  склад№" . $custom_data[12];
        } else
            $orders["addres[]"] = "Не указан";

    if (isset($custom_data[18]))
        $custom_fields .= "\nЕГРПОУ:" . $custom_data[18] . "\n";
    if (isset($custom_data[19]))
        $custom_fields .= "\nНомер свидетельства плательщика НДС :" . $custom_data[19] .
            "\n";
    $orders["addres_counter"] = "2";
    if (isset($custom_data[16]))
        if ($custom_data[16] == 26)
            $custom_fields .= "\nЮридическое лицо\n";
        else
            $custom_fields .= "\Физическое лицо\n";
    ///end address

    $orders["commentary_total_order"] .= "Номер заказа в магазине№" . $order_id . "\n " .
        $value["comment"] . "\n " . "EMAIL:" . $value["email"] . "\n Оплата: " . $value["payment_method"] .
        "\n Доставка: " . $value["shipping_method"]; // КОММЕНТАРИИ

    //default
    $addr_query_string = "&num_build[]=&num_office_flat[]=";


    //product

    $this->load->model('account/order');
    $products = $this->model_account_order->getOrderProducts($order_id);
    $orders["show_next_pack"] = "on";

    $q = "";
    foreach ($products as $value => $key) {
        $q .= "&pack[]=" . urlencode($key["name"] . " (" . $key["sku"] . ")");
        $q .= "&num_pack[]=" . urlencode($key["quantity"]);
        $q .= "&unit[]=" . urlencode("1");
        $q .= "&price_pack[]=" . urlencode($key["price"]);

    }


    $curl = curl_init($url);
    curl_setopt($curl, CURLOPT_POST, true);
    curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($orders).$q.$addr_query_string);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($curl, CURLOPT_COOKIEJAR, "cookie.txt");
    curl_setopt($curl, CURLOPT_COOKIEFILE, "cookie.txt"); //saved cookies
    curl_setopt($curl, CURLOPT_USERAGENT,'Mozilla/5.0 (Windows NT 6.1; rv:11.0) Gecko/20100101 Firefox/11.0');
    $response = (curl_exec($curl));  
    curl_close($curl);


}