如何使用PHP编写RESTful API方法

require 'vendor/autoload.php';

$app = new SlimApp();

$app->get('/api/users', function ($request, $response) {
    // 处理GET请求用户列表的逻辑
});

$app->post('/api/users', function ($request, $response) {
    // 处理POST请求创建用户的逻辑
});

$app->put('/api/users/{id}', function ($request, $response, $args) {
    // 处理PUT请求更新用户信息的逻辑
});

$app->delete('/api/users/{id}', function ($request, $response, $args) {
    // 处理DELETE请求删除用户的逻辑
});

$app->run();

$requestData = $request->getParsedBody(); // GET请求使用$queryParams 替代

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

// 进行数据验证和处理

// 数据验证
if (empty($username) || empty($password)) {
    // 返回错误信息
    $response->getBody()->write(json_encode(['error' => 'Invalid input']));
    return $response->withStatus(400);
}

// 权限验证
if (!$user->hasPermission('create_user')) {
    // 返回错误信息
    $response->getBody()->write(json_encode(['error' => 'Permission denied']));
    return $response->withStatus(403);
}

// 数据库操作
$user = new User();
$user->username = $username;
$user->password = $password;
$user->save();

// 返回成功信息
$response->getBody()->write(json_encode(['success' => true]));
return $response->withStatus(200);

$responseData = [
    'username' => $user->username,
    'email' => $user->email,
    'created_at' => $user->created_at,
];

$response->getBody()->write(json_encode($responseData));
return $response->withStatus(200);