Email Newsletter 3 : Controllers

<?php

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

class Registration extends CI_Controller {

    public function __construct() {
        parent::__construct();
        $this->data['site_title'] = 'Registration';
        $this->data['current_url'] = current_url();
    }

    public function unsubscribe() {
        $email = $this->input->get('m');
        $this->db->query("UPDATE mt_guest SET unsubscribe='Y' WHERE email '".$email."'"));
        $this->data['page_title'] = "Thank you";
        $this->data['message'] = "You will be no longer to receive our offers.";
    $this->load->view('yourFile',$this->data);
    }

    public function complete_subscribe() {
        if ($this->input->server('REQUEST_METHOD') == 'POST') {
            $this->load->helper("citstudio-mailer/mailer");
            $this->load->library("SMTP_validateEmail");

            $data['mail'] = $email = $this->input->post('mail-subscriber');
            $data['code'] = $code = $this->input->post('verification-code');
            $data['name'] = $name = $this->input->post('name-subscriber');

            $mx_email_validator = new SMTP_validateEmail();
            $check_mx_email = $mx_email_validator->validEmail($email);
            if (!$check_mx_email) {
                $this->data['page_title'] = "Subscribe Signup Error";
                $this->data['pages'] = $this->data['error_pages'] . "subscribe";
                $this->data['message'] = "We're Sorry, we're only send great Information to a Human";
        $this->load->view('yourFile',$this->data);
            } else {
                if ($this->subscribe_check($email, TRUE, $data)) {
                    $content = subscribe_finish($data['mail'], $data['name']);
                    $dump = sendmail($content);
                    redirect(base_url(), 'refresh');
                } else {
                    $this->data['page_title'] = "Subscribe Signup Error " . $mail;
                    $this->data['message'] = "We're Sorry, email already taken.";
            $this->load->view('yourFile',$this->data);
                }
            }
        } else {
            $this->data['page_title'] = "Subscribe Signup Error";
            $this->data['message'] = "We're Sorry, we're only send great Information to a Human";
            $this->load->view('yourFile',$this->data);
        }
    }

    public function subscribe_check($mail, $insert = FALSE, $data = NULL) {
        $result = TRUE;
        $rec = $this->db->query("SELECT * FROM mt_guest WHERE email='".$mail."' AND type='SUBSCRIBER'")->result_array();
        if (sizeof($rec) > 0) {
            $result = FALSE;
        }
        if ($insert) {
            $email = $data['mail'];
            $name = $data['name'];
            $code = $data['code'];
        $this->db->query("INSERT INTO mt_guest (fields) VALUES (value)")
            $this->crud->create("mt_guest", $in);
            $result = TRUE;
        }
        return $result;
    }

    public function subscribe() {
        // check if mail-subscriber parameter are provided
        $mail = @$_REQUEST["mail-subscriber"];
        $code = @$_GET["activation-code"];


        if (isset($mail)) {

            $this->load->helper("citstudio-mailer/mailer");
            $this->load->library("SMTP_validateEmail");

            $mx_email_validator = new SMTP_validateEmail();
            $check_mx_email = $mx_email_validator->validEmail($mail);
            if (!$check_mx_email) {
                $this->data['page_title'] = "Subscribe Signup Error";
                $this->data['pages'] = $this->data['error_pages'] . "subscribe";
                $this->data['message'] = "We're Sorry, we're only send great Information to a Human";
        $this->load->view('yourFile',$this->data);
            } else {
                $this->data['email'] = $mail;
                if (!$this->subscribe_check($mail)) {
                    $this->data['page_title'] = "Subscribe Signup Error " . $mail;
                    $this->data['message'] = "We're Sorry, email already taken.";
            $this->load->view('yourFile',$this->data);
                } else {
                    $_subscribe["email"] = $mail;
                    $_subscribe["confirmation_code"] = md5("code" . " Subscribe" . $mail);

                    if ($this->input->server('REQUEST_METHOD') == 'GET') {
                        $this->data['activation_code'] = $_subscribe["confirmation_code"];
                    } else {
                        if (!isset($code)) {
                            $content = subscribe_verify_content($mail, $_subscribe["confirmation_code"]);
                            $dump = sendmail($content);
                        }

                        $this->data['activation_code'] = "";
                        if (isset($code)) {
                            $this->data['activation_code'] = $code;
                        }
                    }
                    $this->data['page_title'] = "Subscribe Signup";
                    $this->data['pages'] = $this->data['view'];
                $this->load->view('yourFile',$this->data);
                }
            }
        } else {
            $this->data['page_title'] = "Subscribe Signup Error";
            $this->data['message'] = "We're Sorry. The page cannot be found.";
        }
        $this->load->view('yourFile',$this->data);
    }
}