消息:未定义变量:检查 [英] Message: Undefine variable: exam
问题描述
控制器:Test.php
controller: Test.php
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Test extends CI_Controller
{
function __construct()
{
parent :: __construct();
$this->load->helper(array('form', 'url'));
$this->load->model('Fetch_data');
}
public function agriculture_exam()
{
$stream = 'agriculture';
$data['exam'] = $this->Fetch_data->top_agriculture_exams($stream);
$this->load->view('header',$data);
}
}
view:header.php
view: header.php
<ul class="list">
<?php
foreach($exam as $row)
{
echo "<li><a href='#'>".$row['exam_name']."</a></li>";
}
?>
</ul>
型号:Fetch_data.php
model: Fetch_data.php
<?php
class Fetch_data extends CI_Model
{
function __construct()
{
parent::__construct();
}
public function top_agriculture_exams($stream)
{
$this->db->select('exam_name');
$this->db->from('all_exams_details');
$this->db->where('field',$stream);
$this->db->order_by('exam_name');
$this->db->limit('10');
$query = $this->db->get();
$result = $query->result_array();
return $result;
}
}
我是ci的新手。在控制器(即Test.php)中,我定义了$ stream ='agriculture',并将$ stream变量传递给top_agriculture_exams模型。现在,当我在header.php文件中获取数据时,它显示一条消息:未定义变量:$ exam我不知道为什么。因此,我该如何解决?请帮助我。
I am new in ci. In controller i.e. Test.php I am defining $stream='agriculture' and pass $stream variable to top_agriculture_exams model. Now, when I am fetching data on header.php file it show me a Message: Undefine variable: $exam I don't know why. So, how can I fix it ?please help me.
谢谢
推荐答案
而不是使用元素数组访问它,而是尝试使用对象访问它。
instead of accessing it using the element array try accessing it using object.
在Fetch_data.php文件中的代码下面进行更改。
change below code in your Fetch_data.php file.
//$result = $query->result_array();
$result = $query->result();
并通过header.php中的对象进行访问。下面是一个示例。
and access it by object in your header.php. here's an example below.
<ul class="list">
<?php foreach($exam as $row): ?>
<?= "<li><a href='#'>" . $row->exam_name . "</a></li>" ?>
<?php endforeach;
</ul>
其中exam_name等于数据库中的列。
where exam_name is equal to the column in your database.
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