How to implement logistics cost calculation function when developing a city in PHP

How to use PHP Developer City to implement logistics cost calculation function

With the development of e-commerce, more and more people are beginning to shop online. The logistics cost calculation function has become an indispensable part of the mall development. This article will introduce how to use PHP Developer City to realize the logistics cost calculation function.

1. Demand analysis
Before developing the logistics cost calculation function of the city, a demand analysis needs to be performed first. We need to determine the needs in the following aspects:

1. Supports multiple logistics distribution methods, such as express delivery, self-pickup, etc.;
2. Calculates based on the products and delivery addresses selected by the user Logistics costs;
3. Consider the freight differences in different regions and support setting different freight standards according to regions;
4. The calculation of logistics costs needs to be updated in real time;
5. Provide user-friendly The interface allows users to clearly see logistics costs.

2. Database design
Before realizing the logistics cost calculation function, it is necessary to design the corresponding database structure. You can create a table named shipping, containing the following fields:

1. id: auto-increment primary key, representing the unique identifier of the logistics method;
2. name: the name of the logistics method;
3. first_weight: first weight weight (unit: kg);
4. first_price: first weight price (unit: yuan);
5. additional_weight: additional weight (unit: kg);
6. additional_price: additional weight price (unit: yuan);
7. region: regions that support delivery and can be stored using JSON arrays.

3. Coding Implementation
Based on the above demand analysis and database design, we can start coding to implement the logistics cost calculation function. The following are the specific implementation steps:

1. Create a file named shipping.php and connect to the database:

   <?php
   $db = new mysqli('localhost', 'username', 'password', 'database');
   if ($db->connect_error) {
    die('连接数据库失败：' . $db->connect_error);
   }

2. According to the user selected collection Delivery address, obtain the freight standard corresponding to the area, and calculate the logistics cost:

   $shipping_id = $_POST['shipping_id'];
   $province = $_POST['province'];
   $city = $_POST['city'];
   $district = $_POST['district'];
   
   // 获取地区对应的运费标准
   $query = "SELECT first_weight, first_price, additional_weight, additional_price FROM shipping WHERE region LIKE '%"$province-$city-$district"%'";
   $result = $db->query($query);
   if ($result->num_rows > 0) {
    $row = $result->fetch_assoc();
    $first_weight = $row['first_weight'];
    $first_price = $row['first_price'];
    $additional_weight = $row['additional_weight'];
    $additional_price = $row['additional_price'];
   
    // 计算物流费用
    $total_weight = 0; // 总重量
    // 根据用户选择的商品，获取所有商品的总重量
    // ...
    $shipping_fee = $first_price; // 首重费用
    if ($total_weight > $first_weight) {
        $additional_weight = ceil(($total_weight - $first_weight) / $additional_weight); // 续重次数
        $shipping_fee += $additional_weight * $additional_price; // 续重费用
    }
   
    echo '物流费用：' . $shipping_fee;
   } else {
    echo '该地区不支持配送';
   }
   

4. Interface display
In order to allow users to clearly see the logistics cost, we can Add a logistics cost calculation module to the product settlement page. After the user selects the shipping address, he can pass the selected address to shipping.php through Ajax request, and then display the calculated logistics cost on the page.

In summary, through the implementation of the above steps, we can use the PHP Developer City to realize the logistics cost calculation function. Such functions can improve user experience and bring better results to the operation of the mall.

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