刚开始就没法做下去了
http://codeigniter.org.cn/forums/data/attachment/forum/201207/23/184940r91yrcykznu5pf5l.jpgMhome.php（模型）< ?php
class Mhome extends Model{
function __construct()
{
parent::Model();
}
function get_category()
{
$query = $this->db->query('select * from category');
return $query->result();
}
}
home.php(控制器)
< ?php
class Home extends Controller{
function __construct()
{
parent::Controller();
}
function index()
{
$this->load->model('Mhome');
$date['category'] = $this->Mhome->get_category();
$date['page_title'] = 'ci开发新闻发布系统';
$this->load->view('header',$date);
$this->load->view('index');
$this->load->view('footer');
}
}
header.php(头部文件 )
< !DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
< html xmlns="http://www.w3.org/1999/xhtml">
< head>
< meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
< title><?=$page_title?></title>
< ?foreach ($category as $row):?> 注：这里想循环输出category_name
< ?=$row->category_name?>
< ?endforeach;?>
< /html>
一运行就出现这种错误提示：
A PHP Error was encounteredSeverity: Notice
Message:Undefined variable: category
Filename: views/header.php
Line Number: 6
A PHP Error was encounteredSeverity: Warning
Message:Invalid argument supplied for foreach()
Filename: views/header.php
Line Number: 6
那位大哥能解说一下 先谢拉 1.在CI中，类的声明，首字母必须大写，类的引用，首字母不必大写。
2.错误提示已经很清楚了，既控制器的category，并未传递到视图中。原因见1
3.foreach时，如果可以，尽量判断一下比较好。
如：foreach ((array)$var as $key).
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