奖励/忠诚度计划正在向所有人发放免费资金

Question

我的应用程序通过每 15 个订单在收据/感谢页面上打印优惠券代码来奖励忠诚度。优惠券价值等于前 15 个订单之一的总价，随机拉动。

这已经工作了一段时间，但现在由于某种原因，每个新用户都在他们的第一笔订单上收到优惠券代码：

$count = dbFuncs::countRewardsProgress($_SESSION['user_id'])['count'];
$displayRewardsCode = dbFuncs::displayRewardsCode()['rewardsCode'];
        if ( $count > 0 ) {
            $remainder = $count % 15;
        }

        if($remainder == 0) {
            echo "Congratulations, You've earned a $$previousOrderValueRoulette coupon code! We thank you for your continued business.";
            echo "<br />";
            echo "<br />";
            echo 'Coupon code: ';
            echo $displayRewardsCode;
            dbFuncs::assignRewardsCode($previousOrderValueRoulette, $_SESSION['user_id'], $displayRewardsCode);
        } else {
            echo 'rewards progress: ';
            echo $count;
            echo '/15 orders completed';
        }

如何确保客户每 15 个订单只收到一张优惠券？

Answer 1

因为如果$count为 0，则 $reminder 未初始化，因此在下一个条件下它等于 0。

要解决，请更改第二个条件以检查$count是否大于 0

    if ( $count > 0 ) {
        $remainder = $count % 15;
    }

    if($count > 0 && $remainder == 0) {
        echo "Congratulations, You've earned a $$previousOrderValueRoulette coupon code! We thank you for your continued business.";
        echo "<br />";
        echo "<br />";
        echo 'Coupon code: ';
        echo $displayRewardsCode;
        dbFuncs::assignRewardsCode($previousOrderValueRoulette, $_SESSION['user_id'], $displayRewardsCode);
    } else {
        echo 'rewards progress: ';
        echo $count;
        echo '/15 orders completed';
    }