How to use PHP Developer City to implement user collection product list function

How to use PHP Developer City to realize the user's favorite product list function

With the rapid development of e-commerce, more and more companies choose to open online malls to expand their business. The user's favorite product list function is a very important function, which allows users to conveniently manage and observe the products they are interested in. This article will introduce how to use PHP Developer City to implement the user's favorite product list function.

1. Database design
First, we need to design a database table for storing user collection product information. You can create a table named "favorites", containing the following fields: id (primary key), user_id (user ID), item_id (item ID), create_time (collection time).

2. User login
To implement the user's favorite product list function, the user first needs to log in. You can use PHP's session mechanism to implement the user login function. When the user logs in successfully, the user ID is saved in the session. Through the user ID in the session, the user's favorite product list information can be obtained later.

3. Collection of products
When the user browses to the product details page, a collection button can be provided. When the user clicks the collection button, an AJAX request can be sent to the server to send the user ID and product ID to the server. After receiving the request, the server first verifies whether the user is logged in, and if not logged in, prompts the user to log in first.

If the user is logged in, store the user ID and product ID in the "favorites" table of the database. At the same time, a prompt can be given on the product details page to inform the user that the product has been successfully added to the favorites list.

4. Display Favorites List
On the user personal center page of the mall, you can add a "My Favorites" menu. When the user clicks the menu, a GET request can be sent to the server to obtain the user's favorite product information from the database.

After receiving the request, the server queries the "favorites" table in the database based on the user ID to obtain the user's favorite product information. This can be achieved using PHP's SQL query statement.

After querying the user's favorite product information, you can use HTML and CSS to render the page and display the user's favorite product list. You can display product pictures, names, prices and other information, and add a cancel favorite button under each product item.

5. Cancel favorites
In the user's favorite product list, add a cancel favorite button for each product item. When the user clicks the button, an AJAX request can be sent to the server to send the user ID and product ID to the server.

After the server receives the request, it first verifies whether the user is logged in. If not, it prompts the user to log in first. If the user is logged in, delete the corresponding favorite record in the "favorites" table of the database.

At the same time, a prompt can be given on the page to inform the user that the product has been successfully removed from the collection list.

6. Summary
Through the above steps, we can use the PHP Developer City to implement the user's favorite product list function. Users can easily collect the products they are interested in, and view and manage their collection list on the personal center page. This not only improves users’ shopping experience, but also helps companies better understand users’ preferences and make personalized recommendations.

During the development process, you need to pay attention to the verification of user login status and the addition, deletion, checking and modification operations of the database. At the same time, this function can be further improved, such as adding paging functions, realizing multi-level classification of goods, etc., to improve the user experience and the functionality of the mall.

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