CodeIgniter教程中foreach循环的错误

Question

我想通过CodeIgniter教程工作，并且我的新闻页面不会从foreach循环输出数据。我得到以下信息：

A PHP Error was encountered 

Severity: Notice 

Message: Undefined variable: news 

Filename: pages/index.php 

Line Number: 1 

和

A PHP Error was encountered 

Severity: Warning 

Message: Invalid argument supplied for foreach() 

Filename: pages/index.php 

Line Number: 1 

这是我的模型类：

<?php 
class News_model extends CI_Model { 

public function __construct() 
{ 
    $this->load->database(); 
} 


public function get_news($slug = FALSE) 
{ 
if ($slug === FALSE) 
{ 
    $query = $this->db->get('news'); 
    return $query->result_array(); 
} 

$query = $this->db->get_where('news', array('slug' => $slug)); 
return $query->row_array(); 
} 


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'); 
} 
} 

而且我的控制器：

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(); 
} 


public function view($slug) 
{ 
    $data['news_item'] = $this->news_model->get_news($slug); 

    if (empty($data['news_item'])) 
    { 
     show_404(); 
    } 

    $data['title'] = $data['news_item']['title']; 

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

} 

而且第一种观点：

<h2><?php echo $news_item['title'] ?></h2> 
    <div id="main"> 
     <?php echo $news_item['text'] ?> 
    </div> 
    <p><a href="news/<?php echo $news_item['slug'] ?>">View article</a></p> 

<?php endforeach ?> 

与第二：

<?php 
echo '<h2>'.$news_item['title'].'</h2>'; 
echo $news_item['text']; 

我知道大概有教程其他问题，但似乎没有帮助我。

谢谢。

Answer 1

在模型中，你已经在构造函数后关闭了你的类。毕竟应该关闭功能。 另外view（）被初始化两次。