suryee-stat-tp6/app/controller/Index.php

<?php
namespace app\controller;

use think\App;
use think\facade\View;

class Index extends Base
{
    public function __construct(App $app)
    {
        parent::__construct($app);
    }

    public function index()
    {
        return View::fetch();
    }

    public function hello($name = 'ThinkPHP6')
    {
        return 'hello,' . $name;
    }
}