CodeIgniter自定义库错误：调用非对象上的成员函数 [英] CodeIgniter custom library error: Call to a member function on a non-object

问题描述

我正在尝试构建一个自定义库，其中将包含整个网站都可以使用的功能。在 /应用程序/库内部，我制作了一个新文件 CustomFuncts ：

I'm trying to build a custom library which will contain functions that would be available through the whole site. Inside /application/libraries I've made a new file CustomFuncts:

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * @brief CommonFuncts      
 * This class is used to provide common user functions to the whole application.
 *
 * @version 1.0
 * @date May 2012
 *
 * 
 */
class CommonFuncts extends CI_Controller {

 protected $ci;

/**
 * function constructor
 */
function __construct()
{
    $this->ci =& get_instance();
}
 /**
* @brief checkCookie
* 
* Checks for a previous cookie, and if exists:
* @li Loads user details to CI Session object.
* @li Redirects to the corresponding page.
* 
*/
public function verificaCookie(){
    $this->ci->load->view('index');
}
 }
/* End of file CommonFuncts.php */
/* Location: ./application/libraries/CommonFuncts.php */

在控制器 welcome.php 中：

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

class Welcome extends CI_Controller {

/**
 * Index Page for this controller.
 *
 * Maps to the following URL
 *      http://example.com/index.php/welcome
 *  - or -  
 *      http://example.com/index.php/welcome/index
 *  - or -
 * Since this controller is set as the default controller in 
 * config/routes.php, it's displayed at http://example.com/
 *
 * So any other public methods not prefixed with an underscore will
 * map to /index.php/welcome/<method_name>
 * @see http://codeigniter.com/user_guide/general/urls.html
 */
public function index()
{
    $this->load->library('commonFuncts');
    $this->commonFuncts->verificaCookie();  
}
}

/* End of file welcome.php */
/* Location: ./application/controllers/welcome.php */

我收到以下错误消息：

A PHP Error was encountered

Severity: Notice

Message: Undefined property: Welcome::$commonFuncts

Filename: controllers/welcome.php

Line Number: 23

Fatal error: Call to a member function verificaCookie() on a non-object in
/var/www/vhosts/unikodf.com/httpdocs/application/controllers/welcome.php on line 23

我尝试了很多事情，包括在库中扩展 CI_Controller 并使用 $ this-> load-> view'代替 $ this-> ci-> load-> view`，但仍然收到相同的消息。

I've tried many things, including extending in the library the CI_Controllerand using $this->load->view' instead of$this->ci->load->view` but still I'm getting the same message.

推荐答案

如果您的库扩展了 CI_Controller 。这意味着您实际上是在扩展控制器的功能。而是这样声明您的库：

If your library extends CI_Controller. That means that you are actually extending the functionality of the controllers. Instead declare your library like this:

class CommonFuncts { }

您不需要从 CI_Controller 继承，因为您编写的不是控制器，而库是不属于MVC模型。它是单个类，可以扩展框架的功能，解决一个常见问题或具有许多控制器使用的功能。

You don't need to inherit from CI_Controller, since you are writing a library not a controller and a library is not part of the MVC model. It's single class which extends the features of the framework, fixes a common issue or has a functionality used by many controllers.

要访问它的方法，请使用：

To access it's methods use:

$this->load->library('CommonFuncts');
$this->commonfuncts->verificaCookie();

如果要简化调用库的名称，请使用：

// The second argument is the optional configuration passed to the library
// The third argument is the name with which you would like to access it
$this->load->library('CommonFuncts', '', 'common');
$this->common->verificaCookie(); //  /\ = configuration
//     /\/\/\ = name

这篇关于CodeIgniter自定义库错误：调用非对象上的成员函数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！