project-manager/api/app/admin/controller/Test.php

<?php

namespace app\admin\controller;

use think\facade\Db;

class Test extends Base
{
    public function index()
    {
        return $this->success([], "成功了");
    }

    public function db()
    {
        return Db::execute('SELECT 1');
    }

    public function vir()
    {
        return getVirRootDir();
    }

}