php简单管理系统模板

// 示例代码：检查数据库连接
try {
    $conn = new PDO("mysql:host=localhost;dbname=testdb", "username", "password");
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "连接成功";
} catch (PDOException $e) {
    echo "连接失败: " . $e->getMessage();
}

// 示例代码：用户认证
$username = $_POST['username'];
$password = $_POST['password'];

// 假设用户信息存储在数据库中
$stmt = $conn->prepare("SELECT * FROM users WHERE username = :username");
$stmt->bindParam(':username', $username);
$stmt->execute();
$user = $stmt->fetch();

if ($user && password_verify($password, $user['password'])) {
    echo "认证成功";
} else {
    echo "认证失败";
}

// 示例代码：权限验证
function checkPermission($user, $permission) {
    // 假设用户权限信息存储在数据库中
    $stmt = $conn->prepare("SELECT * FROM user_permissions WHERE user_id = :user_id AND permission = :permission");
    $stmt->bindParam(':user_id', $user['id']);
    $stmt->bindParam(':permission', $permission);
    $stmt->execute();
    return $stmt->fetch() !== false;
}

if (checkPermission($user, 'admin')) {
    echo "你有权限执行此操作";
} else {
    echo "你没有权限执行此操作";
}