How to Pass ID variable to controller in CodeIgniter - php

Question

I have a list of messages and when the click on the title it takes them to another view where they can see the expanded message.
This is the view from which I click the link.
Postings View.
Link
Message Controller:
class Message extends CI_Controller {
var $TPL;
public function __construct()
{
parent::__construct();
}
private function display()
{
$query = $this->db->query("SELECT FROM messages WHERE id = '$id';");
$this->TPL['message'] = $query->result_array();
$this->template->show('Message', $this->TPL);
}
public function index()
{
$this->display();
}
}
Message View
<?$int=0;?>
<? foreach ($threads as $row) { ?>
<div class="row">
<div class="message">
<h3><?= $row['title']?></h3>
<p><?= $row['message']?></p>
<p><?= $row['member']?></p>
</div>
</div>
<hr>
<? $int++;?>
<? } ?>

Answer 1

This is easy. Change your code as follwoing
Link
Then change you display method as public and send ID param there like
public function display($id){
$this->db->where('id', $id);
$query = $this->db->get('messages');
$this->TPL['message'] = $query->result_array();
$this->template->show('Message', $this->TPL);
}
And finally remove $int=0 & $int++; from view file as you are not using this. Now test

Answer 2

Change the link
Link
And in your controller
public function display() {
$id=$this->uri->segment(3);
if($id==null) {
redirect('Index');
}
else {
$this->db->where('id', $id);
$query = $this->db->get('messages');
$this->TPL['message'] = $query->result_array();
$this->template->show('Message', $this->TPL);
}
}