Portable functions in OOP?

[eluser]Ludwig Wendzich[/eluser]
This is my code for student.php

Code:

<?php

class Student extends Controller {

    function Student()
    {
        parent::Controller();
        $this->load->helper('form');
        $this->load->library('auth');

        $this->output->enable_profiler(TRUE);    
    }
    
    function index()
    {
        if($this->auth->logged_in($this->session->userdata('logged_in'))):
            $this->load->view('student/already_logged_in');
        else:
            $this->auth->login();
        endif;
    }
    
    
    function register()
    {        
        if($this->auth->logged_in($this->session->userdata('logged_in'))):
            $this->load->view('student/already_logged_in');
        else:
            
            $this->load->library('validation');
                
            $this->validation->set_error_delimiters('<p class="error">', '</p>');
            
            $rules['password']        = "trim|required|min_length[6]|matches[v_password]|md5";
            $rules['v_password']    = "trim|required";
            $rules['email']            = "trim|required|valid_email|callback_email_check";
            $rules['level']            = "trim|required|numeric";
            $rules['firstname']        = "trim|required|alpha";
            $rules['lastname']        = "trim|alpha";
    
            $this->validation->set_rules($rules);
    
            $fields['email']        = 'Email';
            $fields['password']        = 'Password';
            $fields['v_password']    = 'Verify Password';
            $fields['level']        = 'NCEA Level';
            $fields['firstname']    = 'First Name';
            $fields['lastname']        = 'Last Name';
        
            $this->validation->set_fields($fields);
            
            
            if ($this->validation->run() == FALSE)
            {
                $this->load->view('student/register');
            }
            else
            {
                $data = array(
                                   'email'         => $_POST['email'] ,
                                   'firstname'     => $_POST['firstname'] ,
                                   'lastname'     => $_POST['lastname'] ,
                                   'password'    => $_POST['password'] ,
                                   'level'        => $_POST['level'],
                                   'ver_num'    => md5($_POST['email'])
                             );
    
                $this->db->insert('users', $data);
                $this->load->view('student/registered');
            }
        endif;
    }
    
function login() {
        
        $this->load->model('student/auth_model');
            
            if(isset($_POST['submit'])){
                $email         = $_POST['email'];
                $password    = $_POST['password'];
            }
            
        $this->auth_model->login($email,$password);
        
    }
    
    /*function login()
    {
        
        $this->load->library('validation');
        
        $this->validation->set_error_delimiters('<p class="error">', '</p>');
        
        $rules['email']     = 'trim|required|valid_email';
        $rules['password']    = 'trim|required|md5';
        
        $this->validation->set_rules($rules);
        
        $fields['email'] = 'Email';
        $fields['password'] = 'Password';
        
        $this->validation->set_fields($fields);
        
        if($this->validation->run() == FALSE):
            $this->load->view('student/login');
        else:
            $email = $_POST['email'];
            $password = $_POST['password'];
            
            //CHECK IF ALREADY LOGGED IN
            
            if($this->session->userdata('email') == $email):
                //User is already logged in.
                $this->load->view('student/already_logged_in');
                return false;
            endif;
            
            //QUERY INFO ON EMAIL
            
            $this->db->where('email', $email);
            $query = $this->db->getwhere('users');
            $row = $query->row();            
            
            //CHECK IF VERIFIED
            
            if($row->verified=="no"):
                            
                $this->load->view('student/unverified');
            
            else:
                        
            //CHECK EMAIL AND PASS
                        

                if($password == $row->password):
                
                    //Destroy old session
                    $this->session->sess_destroy();
                    
                    //Create a fresh, brand new session
                    $this->session->sess_create();
                    
                    //Remove the password field
                    unset($row->password);
                    
                    //Set session data
                    $this->session->set_userdata($row);
                    
                    //Set logged_in to true
                    $this->session->set_userdata(array('logged_in' => true));
                    redirect('student', 'location');
                   else:
                    $this->load->view('student/failed_login');
                endif;
                
            endif;
        endif;
    }*/
    
    
    function verify()
    {
        $data['vn'] = $this->uri->segment(3);
        
        $this->db->where('ver_num', $data['vn']);
        $update = array(
                        'verified'    =>'yes'
                        );
        $this->db->update('users', $update);
        
        $this->load->view('student/verify');
    
    }
    
    
    function logout()
    {
        $this->session->sess_destroy();
        redirect('student/login', 'location');
    }
}
?&gt;