CodeIgniter Extending Multiple Controllers?

Question

Can't find a way to do this, possibly because there is another way to do this?

Some of my controllers extend AdminLayout and some of them extend ModLayout but I also need these pages to extend a LoggedIn Controller.

class Profile extends AdminLayout, LoggedIn {

However looking into there is no way to do this nicely. Is there a workaround?

Answer 1

Assuming that you are using Codeigniter 2, this can be done by putting all you extended controller classes in the same file.

In /application/core create a file called MY_Controller.php (don't forget to check the subclass prefix in config.php around line 109)

In here you can add all you controller classes to extend. For example;

<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
 * MY_Controller Class
 *
 *
 * @package Project Name
 * @subpackage  Controllers
 */
class MY_Controller extends CI_Controller {

    public function __construct() {
        parent::__construct();
        $this->form_validation->set_error_delimiters('<div class="form-error">', '</div>');
    }
}

class LoggedIn extends MY_Controller {

    public function __construct() {
        parent::__construct();
        if (is_logged_in() == FALSE) {
            $this->session->set_userdata('return_to', uri_string());
            $this->session->set_flashdata('message', 'You need to log in.');
            redirect('/home');
        }
    }
}

class AdminLayout extends LoggedIn {

    public function __construct() {
        parent::__construct();
        // do something
    }
}

class ModLayout extends LoggedIn {

    public function __construct() {
        parent::__construct();
        // do something
    }
}

/* End of file  */
/* Location: ./application/core/ */

Then when you create your controllers as per normal, just choose the base controller class to extend. Example;

class Foo extends AdminLayout {

    public function __construct() {
        parent::__construct();
        if (is_logged_in() == FALSE) {
            $this->session->set_userdata('return_to', uri_string());
            $this->session->set_flashdata('message', 'You need to log in.');
            redirect('/home');
        }
    }
}

or

class Bar extends ModLayout {

    public function __construct() {
        parent::__construct();
        if (is_logged_in() == FALSE) {
            $this->session->set_userdata('return_to', uri_string());
            $this->session->set_flashdata('message', 'You need to log in.');
            redirect('/home');
        }
    }
}

Answer 2

PHP does not support multiple inheritance. You could use Codeigniter helpers or libraries for this.

Have a look at the library examples:

http://codeigniter.com/wiki/Simplelogin