<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class User extends CI_Controller
{
    public function __construct()
    {
        parent::__construct();
        $this->output->set_content_type('application/json');
    }

    // 访问：GET /api/v1/user/center
    public function center()
    {
        $data = [
            'code' => 200,
            'version' => 'v1',
            'data' => [
                'username' => 'John Doe',
                'email' => 'john@example.com'
            ]
        ];
        $this->output->set_output(json_encode($data));
    }

    // 访问：POST /api/v1/user/login
    public function login()
    {
        // 从输入流获取JSON数据
        $input = json_decode(file_get_contents('php://input'), true);
        // 业务逻辑...
    }
}