php CODEIGNITER 未定义索引
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CODEIGNITER undefined index
提问by mabbs
:D got some problems here
:D 这里有一些问题
error code
错误代码
A PHP Error was encountered
遇到 PHP 错误
Severity: Notice
严重性：注意
Message: Undefined index: DESCRIPTION
消息：未定义索引：描述
Filename: views/dashboard_view.php
文件名：views/dashboard_view.php
Line Number: 13
行号：13
the controller:
控制器：
function index()
{
if($this->session->userdata('logged_in'))
{
$session_data = $this->session->userdata('logged_in');
$data['username'] = $session_data['USERNAME'];
$data['companyid'] = $session_data['COMPANYID'];
$data['category']=$this->main_model->get_category();
$this->load->view('dashboard_view', $data);
}
else
{
//If no session, redirect to login page
redirect('main', 'refresh');
}
}
model
模型
function get_category(){
$this->db->select('*');
$this->db->from('view_category');
$category=$this->db->get();
return $category->result();
}
view
看法
<h2>Welcome <?php echo $username; ?>!</h2>
<?= form_hidden ($companyid); ?>
<br>
<a href="login/logout">Logout</a>
<? foreach($category ):?>
<tr>
<td><?= $category['DESCRIPTION']; ?></td><-- this is line 13
</tr>
<? endforeach;?>
回答by Sushil Kumar Singh
Follow these steps :-
按着这些次序 ：-
Check if your model is loaded correctly or not . Either load it manually before calling it or you can autoload your model in config/autoload file.
Before looping through your catogory in view file , try printing the array . I think there is no index named description in your category array .
Change :-
$category->result();To :-
$category->result_array();Also :-
<td><?= $category['DESCRIPTION']; ?></td>To :-
<td><?php echo $category['DESCRIPTION']; ?></td>
检查您的模型是否正确加载。在调用之前手动加载它，或者您可以在配置/自动加载文件中自动加载您的模型。
在循环查看视图文件中的类别之前，请尝试打印数组。我认为您的类别数组中没有名为 description 的索引。
改变 ：-
$category->result();到 ：-
$category->result_array();还 ：-
<td><?= $category['DESCRIPTION']; ?></td>到 ：-
<td><?php echo $category['DESCRIPTION']; ?></td>
Hope it helps you :)
希望对你有帮助：）
回答by Code L?ver
You foreach should be this:
你 foreach 应该是这样的：
<?php foreach($category as $rows): ?>
^^^ add this
And then get the data by this:
然后通过这个获取数据：
<td><?php echo $rows['DESCRIPTION']; ?></td>
You can also check that what it is returning to get that just do print_r($rows);in the foreach loop.
您还可以检查它返回的内容以获取print_r($rows);在 foreach 循环中执行的操作。
Note: avoid to use the sort tag of PHP as many servers are not supporting to this.
注意：避免使用 PHP 的 sort 标签，因为很多服务器不支持这个。
回答by Cybermatatu
Have you tried loading the model before using it?
在使用模型之前，您是否尝试过加载模型？
Example: $this->load->model('main_model');
例子： $this->load->model('main_model');
