PHP Developer City, a method to implement product evaluation function

How to use PHP developer mall to implement product evaluation function

With the rapid development of e-commerce, more and more mall websites have begun to provide product evaluation functions, which can not only help consumers better understand products quality and performance, and can also provide merchants with feedback and improvement suggestions on products. This article will introduce how to use PHP to develop a mall to realize the product evaluation function.

1. Database design
First, we need to design a database to store product and evaluation information. The database can include the following tables:

1. Product table (product): used to store basic information of products, such as product ID, name, price, inventory, etc.;
2. User table (user ): used to store basic user information, such as user ID, user name, password, etc.;
3. Evaluation table (comment): used to store evaluation-related information, such as evaluation ID, user ID, product ID, Review content, ratings, etc.

2. Page design

1. Product details page: In the product details page, we need to display the basic information of the product and provide a form for users to evaluate. Users can fill in the evaluation content and ratings in the form and submit the form.
2. Review list page: In the review list page, we need to display all reviews of the product. The evaluation content, ratings, and evaluator information can be displayed in reverse chronological order.

3. PHP Development Implementation

1. Connect to the database: In the PHP code, you first need to connect to the database and select the corresponding database table.
2. Get product information: In the product details page, you need to obtain the basic information of the product from the database and display it on the page.
3. Submit evaluation: When the user fills out the evaluation form and submits it, the evaluation information needs to be inserted into the evaluation form through PHP code.
4. Get the evaluation list: In the evaluation list page, you need to get all the evaluations from the evaluation table through PHP code and display them on the page in reverse chronological order.

4. Security considerations
When developing the product evaluation function, we need to consider security to prevent malicious attacks and illegal operations.

1. Input filtering: When users submit evaluation information, the content input by the user needs to be filtered and verified to prevent XSS attacks and SQL injection.
2. User identity verification: In order to prevent illegal users from making reviews, we can confirm the user's identity through user identity verification.
3. Prevent repeated evaluations: In order to prevent users from evaluating the same product multiple times, we can verify the user ID and product ID to ensure that each user can only evaluate once.

Summary:
Through the above steps, we can use the PHP Developer City to realize the product evaluation function. This can not only improve user experience, but also help merchants understand the quality and performance of goods and improve and optimize products. At the same time, during the development process, we also need to pay attention to security to prevent malicious attacks and illegal operations. I hope this article can be helpful to developers and implement a complete mall evaluation function.

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