php实现注册登录

2026-04-02 21:47:58PHP

PHP 注册功能实现

创建注册表单页面（register.php）：

<form action="register_process.php" method="post">
    <input type="text" name="username" placeholder="用户名" required>
    <input type="email" name="email" placeholder="邮箱" required>
    <input type="password" name="password" placeholder="密码" required>
    <input type="password" name="confirm_password" placeholder="确认密码" required>
    <button type="submit">注册</button>
</form>

处理注册逻辑（register_process.php）：

<?php
// 连接数据库
$conn = new mysqli('localhost', 'username', 'password', 'database');

// 验证输入
$username = $_POST['username'];
$email = $_POST['email'];
$password = $_POST['password'];
$confirm_password = $_POST['confirm_password'];

if ($password !== $confirm_password) {
    die("两次密码输入不一致");
}

// 密码哈希
$hashed_password = password_hash($password, PASSWORD_DEFAULT);

// 插入数据库
$stmt = $conn->prepare("INSERT INTO users (username, email, password) VALUES (?, ?, ?)");
$stmt->bind_param("sss", $username, $email, $hashed_password);

if ($stmt->execute()) {
    header("Location: login.php?register=success");
} else {
    echo "注册失败: " . $conn->error;
}
?>

PHP 登录功能实现

创建登录表单页面（login.php）：

<form action="login_process.php" method="post">
    <input type="text" name="username" placeholder="用户名" required>
    <input type="password" name="password" placeholder="密码" required>
    <button type="submit">登录</button>
</form>

处理登录逻辑（login_process.php）：

php实现注册登录

<?php
session_start();
$conn = new mysqli('localhost', 'username', 'password', 'database');

$username = $_POST['username'];
$password = $_POST['password'];

$stmt = $conn->prepare("SELECT id, username, password FROM users WHERE username = ?");
$stmt->bind_param("s", $username);
$stmt->execute();
$result = $stmt->get_result();

if ($result->num_rows === 1) {
    $user = $result->fetch_assoc();
    if (password_verify($password, $user['password'])) {
        $_SESSION['user_id'] = $user['id'];
        $_SESSION['username'] = $user['username'];
        header("Location: dashboard.php");
    } else {
        echo "密码错误";
    }
} else {
    echo "用户名不存在";
}
?>

用户会话管理

检查登录状态的通用代码（auth_check.php）：

<?php
session_start();
if (!isset($_SESSION['user_id'])) {
    header("Location: login.php");
    exit();
}
?>

在需要登录的页面引入检查：

php实现注册登录

<?php require 'auth_check.php'; ?>

安全增强措施

使用预处理语句防止SQL注入

$stmt = $conn->prepare("INSERT INTO users (username, email, password) VALUES (?, ?, ?)");
$stmt->bind_param("sss", $username, $email, $hashed_password);

密码重置功能建议：

// 生成重置令牌
$token = bin2hex(random_bytes(32));
$stmt = $conn->prepare("UPDATE users SET reset_token = ?, token_expires = DATE_ADD(NOW(), INTERVAL 1 HOUR) WHERE email = ?");
$stmt->bind_param("ss", $token, $email);

数据库表结构示例

用户表基本结构：

CREATE TABLE users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) NOT NULL UNIQUE,
    email VARCHAR(100) NOT NULL UNIQUE,
    password VARCHAR(255) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    reset_token VARCHAR(64),
    token_expires DATETIME
);

标签: php