too long

I am new to CodeIgniter.

I am using HMVC in CodeIgniter and want to use a module function in many other modules:

e.g I have a Locaton_model with function get_locations($param) { return; }

How do I use the above function in many other modules? Should I load the model in other module controllers every time I need this function or define the function some where globally?

You can easily achieve that by using core controllers: http://ellislab.com/codeigniter/user-guide/general/core_classes.html

Instead of beginning your model with:

class Some_model extends CI_Model {}

You start with:

class Some_model extends MY_Model {}

Edit: It is also possible to use libraries: http://ellislab.com/codeigniter/user-guide/general/creating_libraries.html

This is useful when you want more general things, like a search engine, a IMAP interface, that kind of stuff.

if your creating your own model first make sure it is inside the core folder second on your controller extends the model name like this

class myController extends Locaton_model {

function index()
{
$this->load->model->("your model name");
$this->yourmodelname->functionname($param);
}

}