CodeIgniter HMVC扩展了MX_Controller,无法正确使用get_instance

Question

我在/ application/core中有一个控制器

/application/core/CMS_Controller.php

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

require APPPATH."third_party/MX/Controller.php";

class CMS_Controller extends MX_Controller {

    public function __construct() {
        parent::__construct();
    }

    public function show_something() {
        echo "something shown";
    }
} 

我在模块中有另一个控制器(/modules/my_module/controllers/controller.php),它从CMS_Controller扩展而来

/modules/my_module/controllers/controller.php

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

class Controller extends CMS_Controller {

    public function index() {
        $this->load->view('view');
    }
} 

并且,在view.php(/modules/my_module/views/view.php)中我这样做: /modules/my_module/views/view.php

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 $ci =& get_instance();
 echo $ci->show_something();
?> 

我收到这个错误:

致命错误:在第3行的/home/gofrendi/public_html/No-CMS/modules/my_module/views/view.php中调用未定义的方法CI :: show_something()

如果我不使用MX_Controller并使用CI_Controller,它将起作用: /application/core/CMS_Controller.php

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

//require APPPATH."third_party/MX/Controller.php";

class CMS_Controller extends CI_Controller {

    public function __construct() {
        parent::__construct();
    }

    public function show_something() {
        echo "something shown";
    }
} 

谁知道这里有什么问题？

Answer 1

在 application/third_party/MX/Controller.php 构造函数末尾（第 54 行之后）我添加了

/* allow CI_Controller to reference MX_Controller */
CI::$APP->controller = $this;

如果你查看代码 $this 指的是当前类 MX_Controller 而 CI::$APP 指的是 CI_controller （查看 MX/Base.php 文件）

所以现在很简单......获取对 CI_Controller 的引用我们将做（按照正常情况）

    $this->CI =& get_instance();

为了获得对 MX_Controller 的引用，我们将做

    $this->CI =& get_instance()->controller;