在MY_Controller Codeigniter 3中找不到变量配置 - Variable config not found in MY_Controller Codeigniter 3

Variable config not found in MY_Controller Codeigniter 3

运行此代码时出错

class MY_Controller extends CI_Controller {
    public function MY_Controller () {
        var_dump ( $this->config->item ('default_app') );
    }
}

错误：

Message: Undefined property: Welcome::$config

我的My_ Controller位于Core文件夹&我使用Codeigniter 3.0.6。错误告诉找不到变量$config。

更改

class MY_Controller extends CI_Controller
{
    public function MY_Controller()
    {
        var_dump ( $this->config->item('default_app') );
    }
}

带有

class MY_Controller extends CI_Controller
{
    public function __construct()
    {
        parent::__construct();
        var_dump ( $this->config->item('default_app') );
    }
}