How to implement the product brand catalog display function in PHP Developer City

With the rapid development of e-commerce, more and more people choose to shop online. As one of the core functions of an online mall, the display of product brand catalogs plays a vital role in the mall's user experience and product sales. This article will introduce how to use PHP to develop and implement the product brand catalog display function in the mall.

1. Database design
Before realizing the display function of the product brand catalog, it is first necessary to design a database to store relevant data. You can create a data table named "brand", containing the following fields:

• id: brand ID, primary key, auto-increment
• name: brand name
• logo: The path of the brand logo

2. Page layout
In order to realize the display function of the product brand catalog, you need to first create a page to display the brand catalog. You can create a file named "brand_list.php" and write the following HTML code:

    



    
商品品牌目录
    

        
    

3. PHP code implementation

1. Connect to the database
   First , to connect to the database in PHP code, you can use the functions provided by the mysqli extension. Write the following PHP code:

   connect_error) {
    die("数据库连接失败：" . $conn->connect_error);
   }
   ?>

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2. Query Data
   Next, write the code to query the database and obtain the brand data. According to the table structure designed in the database, you can use the SQL statement "SELECT * FROM brand" to query all brand data. Write the following PHP code:

   query($sql);
   
   if ($result->num_rows > 0) {
    // 遍历查询结果，生成品牌目录
    while ($row = $result->fetch_assoc()) {
        echo "
   " . $row['name'] . "
   ";
    }
   } else {
    echo "暂无品牌数据";
   }
   
   // 关闭数据库连接
   $conn->close();
   ?>

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3. Modify the HTML code
   Finally, insert the PHP code that generates the brand catalog into the HTML code. Insert the following code into the corresponding location in the "brand_list.php" file:

   num_rows > 0) {
    // ... 遍历查询结果，生成品牌目录
    // ...
   } else {
    echo "暂无品牌数据";
   }
   
   // 关闭数据库连接
   // ...
   ?>

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   4. Run the test
   Open the "brand_list.php" page in the browser. See the brand directory generated based on the brand data in the database.

   Summary:
   Through the above steps, we can use PHP to develop and implement the product brand catalog display function in the mall. First, a database needs to be designed to store brand data. Then, place the corresponding HTML code in the page. Finally, use PHP code to connect to the database and obtain brand data, and dynamically generate a brand directory by traversing the query results. Through this implementation method, users can easily browse and select the product brands they are interested in, improving the user experience and sales effect of the mall.

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