How to implement the product brand filtering function in PHP Developer City

With the booming development of e-commerce, more and more malls are beginning to use PHP for development. In a mall with a large number of products, in order to facilitate users to quickly find the products they want, it is usually necessary to provide a brand filtering function. This article will introduce in detail the method of implementing the product brand filtering function in the PHP Developer City.

First, create a corresponding data table in the database to store product information. This table should at least contain fields such as product ID, title, picture, price, brand, etc. The brand field is used to store the brand information to which each product belongs.

Next, we need to display the product brand filtering options on the front-end page. You can use HTML form elements to create a multi-select box, and the value of the option can be set to the actual brand name in the database. Users can select one or more brands to filter based on their needs.

In the PHP background code, we first need to connect to the database and query all brand names. You can use MySQL's SELECT DISTINCT statement to obtain unique brand names. Query results can be stored in an array for subsequent use.

When the user clicks the filter button to submit the form, we need to get the brand value selected by the user. You can use PHP's $_POST or $_GET method to obtain the form parameter values. Store these values ​​in an array for later use.

Next, we need to construct a SQL query statement based on the brand value selected by the user. You can use MySQL's WHERE statement to filter products. If the user does not select any brand value, the query statement does not need to contain a WHERE statement. If the user selects one or more brand values, the query statement needs to use an IN statement to match the brand name with the brand values ​​selected by the user.

By executing the query statement, we can obtain product information that meets the filtering conditions. You can use PHP's mysqli_query function to execute query statements, and use the mysqli_fetch_assoc function to obtain query results row by row. Store the query results in an array for subsequent use.

Finally, we can display product information filtered according to the brand selected by the user on the front-end page. You can use HTML and CSS to create a product list, and use PHP loop statements to traverse the product information array and output product titles, pictures, prices and other information one by one.

In addition to the basic brand filtering function, we can also sort products. You can add a drop-down box to the front-end page to choose to sort by fields such as price, sales volume, or ratings. Users can choose to sort in ascending or descending order. After clicking the submit button, we can implement the sorting function of products by modifying the SQL query statement.

To sum up, by storing product information and brand names in the database, and implementing filtering and sorting functions through PHP, we can implement product brand filtering functions in the mall developed by PHP. Users can quickly find products that meet the conditions according to their needs and improve their shopping experience.

The above is the detailed content of How to implement the product brand filtering function in PHP Developer City. For more information, please follow other related articles on the PHP Chinese website!