扩展控制器 Codeigniter

Question

我已经在 IIS 上安装了 Codeigniter。一切都很顺利。

我正在尝试扩展 CI_Controller 类。我这样做的原因是在构造函数中进行安全检查。一些控制器将扩展 CI_Controller。一些需要安全的控制器将扩展 MY_Controller。这对我来说似乎是个好方法。

到目前为止，我已遵循以下说明：

Creating Core Classes

但是当我调用扩展 MY_Controller 的页面时，我得到一个空白页面。 检查 Firebug 中的网络选项卡，我看到“500 内部服务器错误”。 我检查了我的 CI 日志，我看到了这个：

DEBUG - 2014-11-24 10:26:47 --> Config Class Initialized
DEBUG - 2014-11-24 10:26:47 --> Hooks Class Initialized
DEBUG - 2014-11-24 10:26:47 --> Utf8 Class Initialized
DEBUG - 2014-11-24 10:26:47 --> UTF-8 Support Enabled
DEBUG - 2014-11-24 10:26:47 --> URI Class Initialized
DEBUG - 2014-11-24 10:26:47 --> Router Class Initialized
DEBUG - 2014-11-24 10:26:47 --> Output Class Initialized
DEBUG - 2014-11-24 10:26:47 --> Security Class Initialized
DEBUG - 2014-11-24 10:26:47 --> Input Class Initialized
DEBUG - 2014-11-24 10:26:47 --> Global POST and COOKIE data sanitized
DEBUG - 2014-11-24 10:26:47 --> Language Class Initialized

现在，作为一个正常的参考点，当我加载任何不扩展 MY_Controller 的控制器时，我会看到：

DEBUG - 2014-11-24 11:00:14 --> Config Class Initialized
DEBUG - 2014-11-24 11:00:14 --> Hooks Class Initialized
DEBUG - 2014-11-24 11:00:14 --> Utf8 Class Initialized
DEBUG - 2014-11-24 11:00:14 --> UTF-8 Support Enabled
DEBUG - 2014-11-24 11:00:14 --> URI Class Initialized
DEBUG - 2014-11-24 11:00:14 --> Router Class Initialized
DEBUG - 2014-11-24 11:00:14 --> No URI present. Default controller set.
DEBUG - 2014-11-24 11:00:14 --> Output Class Initialized
DEBUG - 2014-11-24 11:00:14 --> Security Class Initialized
DEBUG - 2014-11-24 11:00:14 --> Input Class Initialized
DEBUG - 2014-11-24 11:00:14 --> Global POST and COOKIE data sanitized
DEBUG - 2014-11-24 11:00:14 --> Language Class Initialized
DEBUG - 2014-11-24 11:00:14 --> Loader Class Initialized
DEBUG - 2014-11-24 11:00:14 --> Helper loaded: url_helper
DEBUG - 2014-11-24 11:00:14 --> Session Class Initialized
DEBUG - 2014-11-24 11:00:14 --> Helper loaded: string_helper
DEBUG - 2014-11-24 11:00:14 --> Session routines successfully run
DEBUG - 2014-11-24 11:00:14 --> Controller Class Initialized
DEBUG - 2014-11-24 11:00:14 --> Database Driver Class Initialized
DEBUG - 2014-11-24 11:00:14 --> Model Class Initialized
DEBUG - 2014-11-24 11:00:14 --> Model Class Initialized
DEBUG - 2014-11-24 11:00:14 --> File loaded: application/views/user/session_box.php
DEBUG - 2014-11-24 11:00:14 --> File loaded: application/views/public/public_menu.php
DEBUG - 2014-11-24 11:00:14 --> File loaded: application/views/public/welcome_message.php
DEBUG - 2014-11-24 11:00:14 --> File loaded: application/views/template.php
DEBUG - 2014-11-24 11:00:14 --> Final output sent to browser
DEBUG - 2014-11-24 11:00:14 --> Total execution time: 0.2295

谁能告诉我怎么了？

MY_Controller

class MY_Controller extends CI_Controller{

    private static $instance;

    /**
     * Constructor
     */
        function __construct()
        {
            parent::__construct();
        }

    public static function &get_instance()
    {
        return self::$instance;
    }
}

扩展它的控制器：

class Project extends MY_Controller{

    public function __construct()
        {
            parent::__construct();
            $this->load->database();        
            $this->load->model('user_model');
        }

    public function index()
    {
            var_dump("hi");
        }


}

Answer 1

将您的 MY_Controller 更改为：

<?php

class MY_Controller extends CI_Controller
{

    /**
     * Constructor
     */
    public function __construct()
    {
        parent::__construct();
    }

}

这是因为$this 将已经包含该实例，因为它正在扩展CI_Controller

我不能确定这是问题，但我希望它有所帮助！