Second-hand recycling website uses transaction scoring system developed in PHP

Second-hand recycling website uses transaction scoring system developed by PHP

With the development of social economy and the improvement of people's environmental awareness, second-hand recycling has gradually become an important way of consumption. As an important link, the development and operation of second-hand recycling websites have attracted more and more attention. In this process, how to ensure the fairness and security of transactions has become an issue that cannot be ignored.

In order to solve this problem, we decided to use PHP to develop a transaction scoring system to add a layer of security to second-hand recycling websites. This article will introduce the design ideas and code examples of this system in detail.

First, we need to define the criteria for transaction scoring. In second-hand recycling transactions, we can consider the following aspects for scoring: the smoothness of the transaction, the quality of the goods, the seller's service attitude, etc. Based on these aspects, we can design a rating system from 1 to 5, where 1 means very poor and 5 means very good.

Next, we need to design a database to store transaction scoring data. We can create a table named "ratings" that contains the following fields: user ID, product ID, rating, rating content, and rating time. At the same time, we can create a table named "users", which contains basic information such as user ID, username, and password.

The following is a sample code to create a "ratings" table:

CREATE TABLE ratings (
    id INT(11) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    user_id INT(11) UNSIGNED,
    item_id INT(11) UNSIGNED,
    rating TINYINT(1),
    review TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

Next, we need to create a page to display the user ratings and evaluation functions. We can use PHP and HTML to create a page called "ratings.php". In this page, we can first query the database to obtain the user's ratings and evaluation information, and then display it in the form of a list. At the same time, we can also provide a form that allows users to rate and review transactions.

The following is the sample code of the "ratings.php" page:

<?php
// 获取用户ID和商品ID
$user_id = $_POST["user_id"];
$item_id = $_POST["item_id"];

// 将评分和评价保存到数据库
if(isset($_POST["submit"])) {
    $rating = $_POST["rating"];
    $review = $_POST["review"];
    
    // 将评分和评价插入"ratings"表中
    $sql = "INSERT INTO ratings (user_id, item_id, rating, review) VALUES ('$user_id', '$item_id', '$rating', '$review')";
    mysqli_query($conn, $sql);
}

// 查询数据库获取评分和评价信息
$sql = "SELECT * FROM ratings WHERE item_id = '$item_id'";
$result = mysqli_query($conn, $sql);
?>

<h1>用户评分和评价</h1>

<!-- 展示评分和评价信息 -->
<table>
    <tr>
        <th>评分</th>
        <th>评价</th>
        <th>时间</th>
    </tr>
    <?php while($row = mysqli_fetch_assoc($result)): ?>
    <tr>
        <td><?php echo $row["rating"]; ?></td>
        <td><?php echo $row["review"]; ?></td>
        <td><?php echo $row["created_at"]; ?></td>
    </tr>
    <?php endwhile; ?>
</table>

<!-- 提供评分和评价表单 -->
<form action="ratings.php" method="post">
    <input type="hidden" name="user_id" value="<?php echo $user_id; ?>">
    <input type="hidden" name="item_id" value="<?php echo $item_id; ?>">
    <label>评分：</label>
    <input type="radio" name="rating" value="1">1
    <input type="radio" name="rating" value="2">2
    <input type="radio" name="rating" value="3">3
    <input type="radio" name="rating" value="4">4
    <input type="radio" name="rating" value="5">5
    <br>
    <label>评价：</label>
    <textarea name="review"></textarea>
    <br>
    <input type="submit" name="submit" value="提交评价">
</form>

With the above code, we can implement a simple transaction rating system. Users can rate and evaluate transactions in the "ratings.php" page, and view ratings and evaluation information from other users.

Summary: The second-hand recycling website uses the transaction scoring system developed in PHP to provide users with a safer and fairer trading environment. By scoring and evaluating transactions, the trust of both parties to the transaction can be improved and the healthy development of second-hand recycling can be promoted. Of course, the above code is just a simple example, and the specific implementation needs to be optimized and adjusted according to actual needs. I hope this article can be helpful to practitioners who use PHP to develop transaction scoring systems.

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