Second-hand recycling website developed using PHP supports high-quality supply chain management

Using PHP to develop a second-hand recycling website to support high-quality supply chain management

As people's awareness of environmental protection continues to increase and resource waste becomes increasingly serious, the second-hand recycling industry is gradually emerging. In order to meet users' needs for sustainable development and environmental protection, it has become particularly important to develop a second-hand recycling website that supports high-quality supply chain management. This article will introduce how to use PHP to develop a powerful and efficient second-hand recycling website, and provide corresponding code examples.

First, set up a PHP development environment. We need to install a local server (such as XAMPP) to build a PHP environment. After the installation is complete, we can start development.

Secondly, create the database. We need to create a MySQL database to store the website's data. Use the following code example to create a database named "recycle":

CREATE DATABASE recycle;
USE recycle;

Then, create the data table. Here, we need to create two data tables: users table and products table. The user table is used to store users' personal information, and the product table is used to store details of recycled products. These two data tables can be created using the following code example:

CREATE TABLE users (
    id INT PRIMARY KEY AUTO_INCREMENT,
    name VARCHAR(50) NOT NULL,
    email VARCHAR(100) NOT NULL,
    password VARCHAR(100) NOT NULL
);

CREATE TABLE products (
    id INT PRIMARY KEY AUTO_INCREMENT,
    name VARCHAR(100) NOT NULL,
    description TEXT NOT NULL,
    price DECIMAL(10, 2) NOT NULL,
    user_id INT NOT NULL,
    FOREIGN KEY (user_id) REFERENCES users(id)
);

Next, write the PHP code.

The first is the user registration and login function. The following is an example of registration code:

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $name = $_POST["name"];
    $email = $_POST["email"];
    $password = $_POST["password"];

    // 将用户信息插入数据库
    $sql = "INSERT INTO users (name, email, password) VALUES ('$name', '$email', '$password')";
    $result = mysqli_query($conn, $sql);
    if ($result) {
        echo "用户注册成功！";
    } else {
        echo "用户注册失败，请重试！";
    }
}
?>

The following is an example of login code:

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $email = $_POST["email"];
    $password = $_POST["password"];

    // 验证登录信息
    $sql = "SELECT * FROM users WHERE email='$email' AND password='$password'";
    $result = mysqli_query($conn, $sql);
    if (mysqli_num_rows($result) == 1) {
        echo "登录成功！";
    } else {
        echo "登录失败，请检查用户名和密码";
    }
}
?>

Then comes product display and added functionality. The following is a code example for displaying products:

<?php
$sql = "SELECT * FROM products";
$result = mysqli_query($conn, $sql);
while ($row = mysqli_fetch_assoc($result)) {
    echo "<div>";
    echo "<h3>".$row["name"]."</h3>";
    echo "<p>".$row["description"]."</p>";
    echo "<p>价格：".$row["price"]."元</p>";
    echo "</div>";
}
?>

The following is a code example for adding products:

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $name = $_POST["name"];
    $description = $_POST["description"];
    $price = $_POST["price"];
    $user_id = $_SESSION["user_id"];

    // 添加产品到数据库
    $sql = "INSERT INTO products (name, description, price, user_id) VALUES ('$name', '$description', '$price', '$user_id')";
    $result = mysqli_query($conn, $sql);
    if ($result) {
        echo "产品添加成功！";
    } else {
        echo "产品添加失败，请重试！";
    }
}
?>

Finally, add links and corresponding forms to the website to implement user registration, login, and product display and added functionality.

Through the above steps, we can develop a powerful second-hand recycling website. It supports user registration and login, product display and addition. Through high-quality supply chain management, we can ensure that the recycled products are of reliable quality and users can easily find their favorite second-hand products. Hope the above content is helpful to you!

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