public function admin_login_data_check()
    {
             $username = $this->input->post('username');
             $password = md5($this->input->post('password'));
             $role = $this->input->post('role');




            $attribute = array(

                'username' => $username,
                'password' => $password,
                'role' => $role


            );

            $QueryResult = $this->db->get_where('admin', $attribute); // select query for code igniter




            if($QueryResult -> num_rows() == 1){



                $attribute_session = array(

                    'current_admin_id'  => $QueryResult->row(0)->admin_id,
                    'current_admin_name'  => $username,
                    'session_role' => $role

                );



                $this->session->set_userdata($attribute_session); // session set afte login succeess
                return TRUE;

            }
            else
            {
                return FALSE;

            }
    }