How to use PHP functions to implement e-commerce functions?

How to use PHP functions to implement e-commerce functions?

With the rapid development of e-commerce, more and more companies and individuals are investing in the construction and operation of online shopping malls. As a powerful server-side scripting language, PHP provides many useful functions and functions to help developers implement various e-commerce functions. This article will introduce some commonly used PHP functions, combined with code examples, to demonstrate how to use these functions to implement e-commerce functions.

1. Database connection and management

In e-commerce websites, databases play a very important role and are used to store product information, user data, etc. PHP provides a series of functions for interacting with the database, such as mysqli_connect(), mysqli_query(), etc. The following is a simple database connection example:

<?php
$servername = "localhost";
$username = "root";
$password = "password";
$dbname = "myDB";

// 创建连接
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接是否成功
if ($conn->connect_error) {
    die("连接数据库失败：" . $conn->connect_error);
} else {
    echo "成功连接到数据库！";
}

// 关闭连接
$conn->close();
?>

2. User registration and login

E-commerce websites usually require users to register and log in, and PHP provides functions related to user management. Functions such as password_hash() and password_verify() are used for password encryption and verification. The following is an example of user registration and login:

<?php
// 用户注册
if(isset($_POST['register'])){
    $username = $_POST['username'];
    $password = $_POST['password'];
    
    // 将密码进行加密处理
    $hashed_password = password_hash($password, PASSWORD_DEFAULT);
    
    // 将用户名和加密后的密码保存到数据库
    $sql = "INSERT INTO users (username, password) VALUES ('$username', '$hashed_password')";
    
    // 执行SQL语句
    if ($conn->query($sql) === TRUE) {
        echo "用户注册成功！";
    } else {
        echo "用户注册失败：" . $conn->error;
    }
}

// 用户登录
if(isset($_POST['login'])){
    $username = $_POST['username'];
    $password = $_POST['password'];
    
    // 查询数据库获取用户信息
    $sql = "SELECT password FROM users WHERE username='$username'";
    $result = $conn->query($sql);
    
    if ($result->num_rows > 0) {
        $row = $result->fetch_assoc();
        
        // 验证密码是否正确
        if(password_verify($password, $row['password'])){
            echo "用户登录成功！";
        } else {
            echo "密码错误！";
        }
    } else {
        echo "用户不存在！";
    }
}

// 关闭数据库连接
$conn->close();
?>

3. Product list and shopping cart management

On e-commerce websites, one of the common functions is the product list. Display and shopping cart management. PHP provides some array functions that can help us display product lists and manage shopping carts. The following is a simple product list and shopping cart management example:

<?php
// 获取商品列表
$sql = "SELECT * FROM products";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "商品名称：" . $row["name"]. " - 商品价格：" . $row["price"]. "<br>";
        
        // 添加到购物车
        echo "<form method='post' action=''>
        <input type='hidden' name='product_id' value='".$row["id"]."'>
        <input type='number' name='quantity' value='1'>
        <input type='submit' name='add_to_cart' value='加入购物车'>
        </form>";
    }
} else {
    echo "暂无商品！";
}

// 购物车管理
session_start();
if(isset($_POST['add_to_cart'])){
    $product_id = $_POST['product_id'];
    $quantity = $_POST['quantity'];
    
    $_SESSION['cart'][$product_id] = $quantity;
    
    echo "商品已添加到购物车！";
}

// 关闭数据库连接
$conn->close();
?>

Through the above example, we can see that it is not complicated to use PHP functions to implement e-commerce functions. Of course, the implementation of e-commerce functions still requires more work, such as order management, payment interface integration, etc., but by learning and mastering the use of PHP functions, we can develop powerful e-commerce websites more efficiently. I hope this article can provide you with some reference and help.

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