Codeigniter: My controller is not able to access the model

//My controller section

<?php
class Myadmin extends CI_Controller 
{
            public function _construct()    
            {
             parent::_construct();
             $this->load->library('form_validation');
             $this->load->helper('form');
             $this->load->model('adder','',TRUE);
            }

            public function index() 
            {
                    echo " i am about to call the model";
                    $this->adder->insert_user();        
            }
}
?>    
**//My model section**

<?php
class Adder extends CI_Model    {
        function_construct()    {
            parent::_construct();
        }

        public function insert_user()   
        {
              echo " Hi开发者_运维知识库 ,the model is accessed";    
        }
}
?>

Is it because of "function_construct()"? It has no space and you should use two _

function _construct(){ parent::_construct(); } Same in Controller

The problem is the way you load the model in your controller.

In the current version of the CodeIgniter you should do something like this:

//loading the model
$this->load->model('adder', 'fubar');

//accessing it's functions
$this->fubar->function();

for more info see this.

EDIT: You have defined a _construct() function which must be __construct(). Also you should fix parent::_construct(); to parent::__construct().