Extending CI_Controller / Indirect modification of overloaded property [duplicate] - codeigniter

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Call to a member function on a non-object [duplicate]
(8 answers)
Closed 10 years ago.
the CI community seems to have no answer to this (or maybe it is so obvious, that it looks like a noob question?), so I ask here.
I've been seeing this kind of error for a long time now (error messages follow), however I have always used this "dirty" workaround. Now I do not want to edit the core CI code anymore, and I know there must be a graceful solution to this.
Here is the setup.
In my application/config/routes I have this
$route['default_controller'] = "dispatcher";
The Dispatcher class in application/controllers/ is defined as this:
class Dispatcher extends MY_Controller {
function __construct() {
parent::__construct();
$this->load->helper(array('form','https'));
}
function index() {
# load models
$this->load->model('site/map');
$this->load->model('site/langs');
$this->load->model('site/pages');
if ( $mapped = $this->map->get_map() ){ // this is the line 21
$this->langs->set_user_lang( $this->GLO['show_lang_in_url'], $this->GLO['show_lang_at_home'] );
$red = base_url().$this->GLO['user_lang_label']."/".$mapped;
redirect($red, "refresh");
}
...
now MY_Controller resides in application/core and is defined as follows:
class MY_Controller extends CI_Controller {
public function __construct() {
parent::__construct();
$this->GLO = array();
#
# set defaults:
#
$this->GLO['deb'] = '';
$this->GLO['baseurl'] = base_url();
... (more GLO[key] = value )
}
public function __set ($key, $value ) {
$this->GLO[$key] = $value;
}
Every model I use starts like this (named accordingly):
class Map extends CI_Model {
function __construct(){
parent::__construct();
}
function get_map(){
.....
return true;
}
Now with CI 2.1.2, PHP 5.3.3, Apache 2 on Debian when trying to load a page, I am getting this error:
A PHP Error was encountered Severity: Notice Message: Indirect
modification of overloaded property Langs::$GLO has no effect
Filename: site/langs.php Line Number: 82
A PHP Error was encountered Severity: Notice Message: Undefined
property: Dispatcher::$map Filename: controllers/dispatcher.php Line
Number: 21
Fatal error: Call to a member function get_map() on a non-object in
/home/webdev/MC/_WWW/application/controllers/dispatcher.php on line 21
The line 21 is the one marked above in the Map model
if ( $mapped = $this->map->get_map() ){
the line 82 in the other model looks like this:
$this->GLO['langs'][] = $temp;
Throughout the code, this GLO array is referenced as $this-GLO[key]. It must be read and written from time to time. If I delete the __set function in MY_Controller, I get more of those warnings.
Where is the problem?
Thanks a lot in advance!

Answer 1

I'm not sure about the first error - but these two:
A PHP Error was encountered Severity: Notice Message: Undefined
property: Dispatcher::$map Filename: controllers/dispatcher.php Line
Number: 21
Fatal error: Call to a member function get_map() on a non-object in
/home/webdev/MC/_WWW/application/controllers/dispatcher.php on line 21
...look like you havent loaded your model correctly?
change
if ( $mapped = $this->map->get_map() ){
to
$this->load->model('map');
if ( $mapped = $this->map->get_map() ){