Codeigniter execute code in every controller - php

Question

I'm rather new to Codeigniter, so I may be going about this the wrong way. In the header for my template, I have a spot for displaying account information or a message to log in.
In order for it to work properly, each controller obviously need to have the same code. To avoid this, the user guide says I should be able to extend CI_Controller and it automatically includes that code. However, that's not working for me. Here's what I've got.
application/core/MY_Controller.php:
<?php
class MY_Controller extends CI_Controller {
function __construct()
{
parent::__construct();
$this->load->database();
$this->load->model('user_model');
if ( $this->user_model->validateToken ( $this->input->cookie('session_token', TRUE) ) )
{
$data['login_info'] = 'Logged in as '. $this->user_model->getUsernameAsLink($this->input->cookie('session_token', TRUE)).'<BR />
Control Panel';
}
else
{
$data['login_info'] = 'You are not logged in<BR />
Log In';
}
}
}
?>
the model it references:
<?php
class User_model extends CI_Model {
public function __construct()
{
}
public function validateToken($token)
{
// Get token from database to check against cookie
$query = $this->db->query('SELECT `login_token` FROM `Users` WHERE `login_token` = "'.$token.'"');
// Match Found?
$rowCount = $query->num_rows();
if ( $rowCount == 1 ) {
return true;
} else {
return false;
}
}
public function getUsernameAsLink ( $token )
{
// Get token from database to check against cookie
$query = $this->db->query('SELECT `username` FROM `Users` WHERE `login_token` = "'.$token.'"');
foreach( $query->result() as $row ) {
$username = $row->username;
}
$returnString = ''.ucfirst ( $username ).'';
return $returnString;
}
}
?>
I'm getting notice errors saying that the $data['login_info'] value doesn't exist. Is there anything I've left out to keep it from processing the extension to MY_Controller?

Answer 1

For $data to be available in your other controllers, you need to make it available. Try setting it to $this->data and using that same thing in the other controllers.