Thoughts on the design of shopping mall product comparison function developed with PHP

Design Thoughts on the Product Comparison Function of the Mall Developed with PHP

With the development of e-commerce, more and more people choose to purchase goods online. In order to facilitate users to choose products, malls usually provide product comparison functions. This article will discuss how to use the PHP developer mall product comparison function design thinking.

First of all, we need to determine the basic functions and needs of product comparison. The purpose of the mall product comparison function is to allow users to compare the characteristics, prices, reviews and other information of different products to help them make better purchasing decisions. For this purpose, we can define the following basic requirements:

1. Users can add products of interest to the comparison list for viewing and comparison at any time.
2. The comparison list should be able to display the key information of each product, such as name, price, rating, etc.
3. Users can modify the comparison list and add or delete products at any time.
4. The comparison list should be consistent across different pages so that users can easily view and modify the comparison list no matter which page they are on.
5. Users can directly access the detailed page of each product through the comparison list to obtain more detailed information.

After introducing the requirements, we will design some database tables and PHP code to implement these functions. The following is a possible design example:

First, we can create a database table named "products" to store basic information about the product, such as name, price, rating, etc. The table structure can be designed as follows:

CREATE TABLE products (
  id INT PRIMARY KEY AUTO_INCREMENT,
  name VARCHAR(255) NOT NULL,
  price FLOAT NOT NULL,
  rating FLOAT NOT NULL
);

Next, we create a database table named "compare" to store the user's comparison list. This table contains two fields: user ID and item ID. The design is as follows:

CREATE TABLE compare (
  user_id INT NOT NULL,
  product_id INT NOT NULL,
  PRIMARY KEY (user_id, product_id)
);

In PHP code, we can use Session to track the user's comparison list. When a user adds or deletes an item, we can store the corresponding item ID in the session. The following is a sample code that shows how to implement the function of adding products to the comparison list:

<?php
session_start();

// 获取要添加到对比列表的商品ID
$product_id = $_GET['product_id'];

// 将商品ID添加到会话中
$_SESSION['compare'][] = $product_id;

// 重定向到商品详细页面
header("Location: product.php?id=" . $product_id);
?>

Similarly, we can modify the code to support the function of removing products from the comparison list:

<?php
session_start();

// 获取要删除的商品ID
$product_id = $_GET['product_id'];

// 在会话中查找并删除对应的商品ID
$index = array_search($product_id, $_SESSION['compare']);
if ($index !== false) {
    unset($_SESSION['compare'][$index]);
}

// 重定向到商品详细页面
header("Location: product.php?id=" . $product_id);
?>

Finally, we can display the user's comparison list on each page of the mall and provide corresponding action buttons and links. The following is a sample code that shows how to display a comparison list on the page:

<?php
session_start();

foreach ($_SESSION['compare'] as $product_id) {
    // 获取对应商品的信息并显示
    $product = getProductById($product_id);
    echo $product['name'] . ", " . $product['price'] . ", " . $product['rating'];
    
    // 显示从对比列表中删除商品的链接
    echo "<a href='remove.php?product_id=" . $product_id . "'>删除</a>";
    
    // 显示链接到商品详细页面的链接
    echo "<a href='product.php?id=" . $product_id . "'>查看详细</a>";
}
?>

The above is the design thinking and code example of using the product comparison function of the PHP Developer City. Through reasonable database design and related PHP code implementation, we can provide users with convenient and fast product comparison services to help them make more informed choices in their purchasing decisions.

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