Codeigniter execute code in every controller

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 />
        <a href="/dashboard">Control Panel</a>';
    }
    else
    {
        $data['login_info'] = 'You are not logged in<BR />
        <a href="/account/login">Log In</a>';
    }      
}
}
?>

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 = '<a href="/profile/'. $username .'">'.ucfirst ( $username ).'</a>';

    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?

Did you make all your other controllers extend MY_Controller instead of CI_Controller? — prodigitalson
– prodigitalson, Commented Oct 11, 2012 at 2:25
Yes, all my controllers are currently extending MY_Controller — Eric
– Eric, Commented Oct 11, 2012 at 2:32
Where does it say that it doesn't exist? In the code you included, there isn't anywhere it is being used, only set. — CWSpear
– CWSpear, Commented Oct 11, 2012 at 2:43
@CWSpear In Codeigniter, the variables are called by their key in $data in the view. I omitted this because it's simply <?php echo $login_info ?> — Eric
– Eric, Commented Oct 11, 2012 at 3:06
Do a print_r($data) right before you call the view. Or better yet, if you do it like in my answer, print_r($this->data). — CWSpear
– CWSpear, Commented Oct 11, 2012 at 3:16

CWSpear · Accepted Answer · 2012-10-11 02:48:01Z

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.

answered Oct 11, 2012 at 2:48

CWSpear

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3 Comments

Eric Over a year ago

I changed all $data references in my controllers to $this->data and passed it to my views, but it still doesn't pass the data from MY_Controller to the next controller. Is there something else that needs to be done?

CWSpear Over a year ago

Are you using it as $this->data in both MY_Controller and your other controllers?

Eric Over a year ago

Using $this->data in all controllers from here on out. Thanks!

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