Second-hand recycling website uses price reduction reminder function developed in PHP

The second-hand recycling website uses the price reduction reminder function developed by PHP

In recent years, with the rise of second-hand commodity trading websites, people's demand for second-hand items has gradually increased. Second-hand recycling websites provide consumers with a convenient, economical, and environmentally friendly channel to reuse waste. However, among the large number of second-hand products, the prices of some products often change from time to time. For users who want to buy second-hand products, it is very important to keep abreast of price changes in order to choose the products they like. In order to improve user experience and attract more users, developers can add a price reduction reminder function to remind users to pay attention to price changes of products of interest.

This article will introduce how to use PHP to develop a price reduction reminder function for a second-hand recycling website. We will demonstrate this with a specific example, assuming we want to alert users of price changes for a certain type of mobile phone.

First, we need to create a product database, including fields such as product ID, name, description, price and release time. We can use the MySQL database to create a table named "products" and add the corresponding fields. The following is a simplified version of the sample code:

CREATE TABLE products (
  id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(50) NOT NULL,
  description VARCHAR(255) NOT NULL,
  price DECIMAL(8,2) NOT NULL,
  publish_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

On the product details page of the website, we need to add a price reduction reminder button. When the user clicks the button, the front end will send a request to the back end for the product. ID. We can use jQuery's AJAX to achieve this function. The following is a simplified version of the sample code:

$(document).ready(function() {
  $(".price-alert-btn").click(function() {
    var productId = $(this).data("productid");
      
    $.ajax({
      url: "price_alert.php",
      type: "POST",
      data: { product_id: productId },
      success: function(response) {
        alert(response);
      }
    });
  });
});

On the backend, we need to write a PHP file price_alert.php that handles requests. This file will receive the item ID from the request and store it into a table in the database called "price_alerts". The following is a simplified version of the sample code:

<?php
  $productId = $_POST["product_id"];
  
  // 省略数据库连接和查询商品信息的代码
  
  // 将商品ID插入到price_alerts表格中
  $insertQuery = "INSERT INTO price_alerts (product_id) VALUES ('$productId')";
  // 执行插入操作
  // ...
  
  echo "已添加到降价提醒列表。";
?>

Finally, we need to write a scheduled task to regularly check price changes and send email notifications to users who have added price reduction reminders. Scheduled tasks can be implemented using Linux's Cron. The following is a simplified version of the sample code:

*/30 * * * * php /path/to/price_check.php

In the price_check.php file, we need to query the product ID in the price_alerts table and check whether its price has changed. If there are changes, we can use the PHPMailer library to send emails to notify users. The following is a simplified version of the sample code:

<?php
  // 省略数据库查询以及变动价格的检查代码
  
  // 查询降价提醒用户的邮箱
  $selectQuery = "SELECT email FROM price_alerts WHERE product_id = '$productId'";
  // 执行查询操作
  // ...

  // 发送邮件
  // ...
?>

Through the above steps, we can develop a price reduction reminder function so that users can learn about product price changes in a timely manner. Of course, this is just a simplified example. In actual development, more details need to be considered, such as user identity authentication, email beautification, etc.

In short, using PHP to develop the price reduction reminder function of a second-hand recycling website provides users with a better shopping experience and can also attract more users. Through the interaction between the front end and the back end, real-time monitoring of commodity prices and user notifications are achieved, improving the competitiveness of second-hand commodity trading websites.

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