parent::__construct();
The reason this line is necessary is because your local constructor will be overriding the one in the parent controller class so we need to manually call it.
<?php
class Blog extends CI_Controller {
public function __construct()
{
parent::__construct();
// Your own constructor code
}
}
?>
Constructors are useful if you need to set some default values, or run a default process when your class is instantiated. Constructors can't return a value, but they can do some default work.