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

Question

我在/application/core 中有一个 Controller

/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";
    }
} 

我在从 CMS_Controller 扩展的模块 (/modules/my_module/controllers/controller.php) 中有另一个 Controller

/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();
?> 

我得到这个错误:

Fatal error: Call to undefined method CI::show_something() in /home/gofrendi/public_html/No-CMS/modules/my_module/views/view.php on line 3

如果我不使用 MX_Controller 而是使用 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";
    }
} 

有人知道这里出了什么问题吗？

Answer 1

在application/third_party/MX/Controller.php在构造函数的末尾(第 54 行之后)我加了

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

如果您查看代码 $this 指的是当前类 MX_Controller 而 CI::$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 的引用我们会做的(和往常一样)

    $this->CI =& get_instance();

为了获得对 MX_Controller 的引用，我们将做

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