Question

我从CodeIgniter用户指南中编写了一个小应用程序，但是当我运行它时，显示给定的消息

Fatal error: Call to a member function get_news() on a non-object in C:\xampp\htdocs\CodeIgniter_Practice\application\controllers\news.php on line 11

代码是

class News extends CI_Controller{
  public function _construct()    
  {
     parent::_construct();   
     $this->load->model('news_model');
  }
  public function index()
  {
  $data['news'] = $this->news_model->get_news(); 
     $data['title'] = 'News archive';

     $this->load->view('templates/header',$data);
     $this->load->view('news/index',$data);
     $this->load->view('templates/footer');
  }
}

第11行是：

$data['news'] = $this->news_model->get_news();

Answer 1

您也可以通过获取model来致电Instance：

class News extends CI_Controller{
 public function __construct()    
 {
   parent::__construct();
   $this->CI = & get_instance();   
   $this->CI->load->model('news_model');
 }
 public function index()
 {
   $data['news'] = $this->CI->news_model->get_news(); 
   $data['title'] = 'News archive';

   $this->load->view('templates/header',$data);
   $this->load->view('news/index',$data);
   $this->load->view('templates/footer');
 }
}

Answer 2

通过查看您的代码，我可以看到您在定义构造时错过了一个' _ '（下划线）。它必须如下：

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

在第11行的C：\ xampp \ htdocs \ CodeIgniter_Practice \ application \ controllers \ news.php中的非对象上调用成员函数get_news（）

2 个答案: