Thoughts on the design of shopping mall coupon function developed with PHP

Design Thoughts on the Mall Coupon Function Developed with PHP

As an important part of the e-commerce platform, the coupon function plays an important role in attracting users and increasing sales. This article will introduce the design thinking of a mall coupon function developed with PHP and give relevant code examples.

1. Database design

First, we need to design the table in which the database stores coupon information. You can consider creating a table named coupons, containing the following fields:

• id: Coupon ID, primary key
• coupon_code: Coupon code, used for users to enter redemption
• discount_amount: Coupon discount amount
• expire_date: Coupon expiration date
• is_used: Whether the coupon has been used
• user_id: The user ID to which the coupon belongs

2. Coupon generation

Merchants can set different rules to generate coupons according to their needs, such as full discounts, discounts, designated product categories, etc. For coupons with full discounts or discounts, you can generate a random discount code and insert the corresponding information into the coupons table; for coupons of specified product categories, you can add relevant fields to the coupons table for recording.

The following is a code example to generate a discount coupon:

function generateCoupon($amount, $expire_date) {
  $coupon_code = generateRandomCode(); // 生成随机优惠码
  $discount_amount = $amount - 10; // 满减10元
  // 将优惠券信息插入到coupons表中
  $sql = "INSERT INTO coupons (coupon_code, discount_amount, expire_date) VALUES ('$coupon_code', '$discount_amount', '$expire_date')";
  // 执行插入操作
  // ...
}

3. Coupon redemption

Users can enter the discount code on the checkout page to redeem it . This process requires verifying the validity of the discount code, whether it has expired, whether it has been used, etc. After the verification is passed, the relevant information needs to be updated to the coupons table.

The following is a code example for coupon redemption:

function redeemCoupon($coupon_code, $user_id) {
  $sql = "SELECT * FROM coupons WHERE coupon_code = '$coupon_code' AND expire_date > NOW() AND is_used = 0";
  // 查询coupons表获取优惠券信息
  // ...
  
  if ($coupon) {
    $coupon_id = $coupon["id"];
    // 更新优惠券的使用状态和所属用户ID
    $sql = "UPDATE coupons SET is_used = 1, user_id = '$user_id' WHERE id = '$coupon_id'";
    // 执行更新操作
    // ...
    return true;
  } else {
    return false;
  }
}

4. Coupon calculation

When the user chooses to use the coupon, the settlement page needs to be Calculation of discount amount.

The following is a code example for coupon calculation:

function calculateDiscount($user_id) {
  $sql = "SELECT SUM(discount_amount) as total_discount FROM coupons WHERE user_id = '$user_id' AND is_used = 1";
  // 查询coupons表获取已使用的优惠券总折扣金额
  // ...
  $result = // 执行查询操作并获取结果
  
  return $result["total_discount"];
}

Through the above code example, we can initially implement a mall coupon function developed with PHP. Of course, based on actual needs, we can further improve the functions, such as adding coupon validity limits, usage condition restrictions, coupon issuance rules, etc.

To sum up, the key to using PHP to develop the coupon function of the city is database design and related operations. Through reasonable database table design, coupon generation, redemption and calculation functions, a powerful and practical mall coupon function can be realized. I hope this article will be helpful to your development work.

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