The discussions_model.php model file has three functions; these are fetch_discussions(), fetch_discussion(), and flag(). The fetch_discussions() function fetches many discussions, the fetch_discussion() function fetches a single discussion, and the flag() function sets a discussion as one that requires moderation by an admin.

The steps to create this model file are as follows:

Create the /path/to/codeigniter/application.models/discussion_model.php file and add the following code to it:

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Discussions_model extends CI_Model {...