Ion Auth检查从MY_L​​oader类登录

Question

This may be a basic Codeigniter (or php) question, but I'm trying to check if a user is logged in with Ion Auth for every page call so I can provide a 'Sign-in' or 'Sign-out' link.

I have my header, content, and footer views loading from MY_Loader class and was trying to use $this->ion_auth->logged_in() to check if a user is logged in, but I get this php error,

PHP Error: Undefined property: MY_Loader::$ion_auth

Here is MY_Loader.php:

<?php

/**
 * /application/core/MY_Loader.php
 *
 */
class MY_Loader extends CI_Loader {
    public function template_main($template_name, $vars = array(), $return = FALSE)
    {
        $vars['signin'] = $this->ion_auth->logged_in() ? 'signout' : 'signin';
        $vars['signin_text'] = $this->ion_auth->logged_in() ? 'Sign-out' : 'Sign-in';
        $content  = $this->view('frontend/main_template/header', $vars, $return);
        $content .= $this->view($template_name, $vars, $return);
        $content .= $this->view('frontend/main_template/footer', $vars, $return);

        if ($return)
        {
            return $content;
        }
    }
}

/* End of MY_Loader.php */
/* Location: ./application/core/MY_Loader.php */

I am autoloading the ion_auth library. How can I call the logged-in() function in MY_Loader class?

Answer 1

The autoloaded files probably haven't been loaded yet. Add $this->load->library('ion_auth') to the top of the method.

Answer 2

EDIT: I misread the question, so sorry. But I'm leaving the answer up for future readers that might find it useful. Try using a hook to solve your problem.

My suggestion is to simply check if the user is logged in from your controller's constructor method and save the result to a class variable.

$this->user_logged_in = (bool)$this->ion_auth->logged_in();

This would let you make the call once for each controller, instead of once for each view (easier to maintain, and keeping basic ACL/logic out of the view). Then all you need to do is pass the variable to your view.

$data['user_logged_in'] = $this->user_logged_in;
$this->load->view('view_file_name', $data);

What I like to do when I want the entire app to require a login is to call these types of checks via CodeIgniter's hooks . In this case, maybe the post_controller_constructor hook, this way it's called automatically (just make sure to filter out the pages you want to ignore this check, ie. login & register, etc).