CodeIgniter默认视图

我有一个名为Page 的控制器

<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Page extends CI_Controller {
    /**
     * Index Page for this controller.
     *
     * Maps to the following URL
     *      http://example.com/index.php/welcome
     *  - or -
     *      http://example.com/index.php/welcome/index
     *  - or -
     * Since this controller is set as the default controller in
     * config/routes.php, it's displayed at http://example.com/
     *
     * So any other public methods not prefixed with an underscore will
     * map to /index.php/welcome/<method_name>
     * @see https://codeigniter.com/user_guide/general/urls.html
     */
    public function index($page = 'home')
    {
        if ( ! file_exists(APPPATH.'views/'.$page.'.php'))
        {
                // Whoops, we don't have a page for that!
                show_404();
        }
        $data['title'] = ucfirst($page); // Capitalize the first letter
        $this->load->view('templates/header', $data);
        $this->load->view($page, $data);
        $this->load->view('templates/footer', $data);
    }
}

但目前它只加载home.php页面http://www.example.com/

我正在努力做到这一点，所以如果我去example.com/test，它会加载test.php

这是我的路线

$route['default_controller'] = 'page';
$route['(:any)'] = 'page/$1';

我是php框架的新手，不知道如何实现这一点。任何帮助都将不胜感激。