


How to use PHP to implement the price protection function of the mall
With the continuous development of the e-commerce market, merchants often provide some preferential activities on their mall websites in order to attract more customers and increase sales. Common offers include discounts, gifts, and price reductions. Among them, price protection is a common preferential means, and its main function is to ensure that the price of goods purchased by buyers will not drop within a period of time. In this article, we will introduce how to use PHP to implement the price protection function of the mall.
- Design database table
Create a table named "price_protection" in the MySQL database, which contains the following fields:
- id INT(11): Primary key, self-increasing
- product_id INT(11): Product ID
- old_price FLOAT(10,2): Last price
- new_price FLOAT(10 ,2): New price
- start_time DATETIME: Price protection start time
- end_time DATETIME: Price protection end time
- Implement price protection function
In the product details page of the mall website, add a "Price Protection" button. Whenever the user clicks the button, a PHP script will be triggered that will retrieve price information from the database based on the item ID the user purchased.
If the timestamp stored in the "end_time" field has expired, return the old price, otherwise return the new price. If the old price is empty, it is set to the current price. If the price has dropped, update the old price and set the new price to the old price. If the price has not dropped, only the price protection period is updated.
The following is the PHP script sample code to implement this function:
<?php $mysqli = new mysqli('localhost', 'username', 'password', 'your_database'); $productId = $_GET['product_id']; $currentTime = date('Y-m-d H:i:s'); $sql = "SELECT * FROM price_protection WHERE product_id='$productId' AND end_time>'$currentTime'"; $result = $mysqli -> query($sql); if ($result -> num_rows == 0) { //如果没有价格保护记录,则返回商品原有价格 $sql = "SELECT price FROM products WHERE id='$productId'"; $result = $mysqli -> query($sql); $row = $result -> fetch_assoc(); echo $row['price']; } else { //如果存在价格保护记录,则返回价格保护的价格 $row = $result -> fetch_assoc(); if ($row['old_price'] == null) { $row['old_price'] = $row['new_price']; $sql = "UPDATE price_protection SET old_price=".$row['old_price']." WHERE id=".$row['id']; $mysqli -> query($sql); } echo $row['old_price']; if ($row['new_price'] < $row['old_price']) { $sql = "UPDATE price_protection SET old_price=".$row['new_price'].", new_price=".$row['new_price']." WHERE id=".$row['id']; $mysqli -> query($sql); } else { $sql = "UPDATE price_protection SET start_time='$currentTime', end_time=DATE_ADD('$currentTime', INTERVAL 7 DAY) WHERE id=".$row['id']; $mysqli -> query($sql); } } ?>
- Front-end implementation
In the JavaScript code of the product details page, protect the price A button is added to the page and when clicked it requests the current price from the server. This price should be displayed to the right of the price on the product page and marked with a price protection icon.
The following is the JavaScript sample code to implement the price protection function:
$(document).ready(function() { $.ajax({ url: 'get_price.php', dataType: 'json', success: function(data) { if (data.success) { $('#price').html('<span class="old-price">¥ '+data.data.old_price+'</span>¥ '+data.data.new_price+'<i class="icon-price-protection"></i>'); } else { $('#price').html('<span>¥ '+data.data.price+'</span><i class="icon-price-protection"></i>'); } } }); });
- Summary
This article introduces how to use PHP to implement price protection in the mall Function. Specific implementation methods are given from the aspects of database design, script implementation, front-end implementation, etc. I hope this article can be helpful to developers, implement the discount function of the mall, and provide buyers with a better shopping experience.
The above is the detailed content of How to use PHP to implement the price protection function of the mall. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.
