Codeigniter - controller can't send data to view - php

Question

I got an error like this :
A PHP Error was encountered
Severity: Notice
Message: Undefined variable: tasks
controller
public function show() {
$data['tasks'] = array();
$data['tasks'] = $this->Tasks_model->show_task()->result();
$this->load->view('pages/all', $data);
}
view
<?php
if( isset($tasks) && ( is_array($tasks) && count($tasks)>0 ) ) {
//echo"<pre>"; print_r($tasks); die();
for($i=0;$i<count($tasks);$i++)
{ ?>
<span><?php echo $task[0]['job']; ?></span><br />
<?php } ?>
<?php }
else { ?>
<span>No tasks records found.</span>
<?php } ?>
Model
public function show_task() {
return $this->db->get('task');
}
what's wrong with my code?

Answer 1

Controller
public function show() {
$this->$data['tasks'] = array();
$this->$data['tasks'] = $this->Tasks_model->show_task();
$this->load->view('pages/all', $data);
}
View
//Here, you can also use for loop to display data.
<?php
if( isset($tasks) && ( is_array($tasks) && count($tasks)>0 ) )
{
//echo"<pre>"; print_r($tasks); die();
for($i=0;$i<count($tasks);$i++)
{ ?>
<span><?php echo $task[0]['job']; ?></span><br />
<?php } ?>
<?php }
else { ?>
<span>No tasks records found.</span>
<?php } ?>
EDIT =>
Model
public function show_task() {
$query = $this->db->get('task');
if( $query->num_rows() > 0 ) //Always check you are getting result or not.
{
return $query->result_array(); //result_array() returns the query result as a pure array
}
else
{
return array();
}
}
Here you are returning return $this->db->get('task'); directly. So you are not getting anythingin View.
First you have to assign $this->db->get('task') to variable e.g. $query and pass result array to controller return $query->result_array();.
Reference => https://www.codeigniter.com/userguide3/database/results.html#result-arrays

Answer 2

Controller:
public function show() {
$data['tasks'] = array();
$data['tasks'] = $this->Tasks_model->show_task();
$this->load->view('pages/all', $data);
}
Model:
public function show_task() {
return $this->db->get('task')->result();
}
View Page:
<?php
if( isset($tasks) && ( is_array($tasks) && count($tasks)>0 ) )
{
//echo"<pre>"; print_r($tasks); die();
for($i=0;$i<count($tasks);$i++)
{ ?>
<span><?php echo $task[0]['job']; ?></span><br />
<?php } ?>
<?php }
else { ?>
<span>No tasks records found.</span>
<?php } ?>