Codeigniter: Controller signup error - php

Question

This is the controller code for signing up:
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Signup extends CI_Controller {
public function index(){
$data = array(
'title' => 'SignUp Page'
);
$this->load->view('header', $data);
$this->load->view('signup');
}
public function signup_validation(){
$this->load->library('form_validation');
$this->form_validation->set_rules('salutation', 'Salutation', 'required');
$this->form_validation->set_rules('fName', 'First Name', 'required|trim|alpha|xss_clean|strip_tags');
$this->form_validation->set_rules('lName', 'Last Name', 'required|trim|alpha|xss_clean|strip_tags');
if($this->form_validation->run()){
$month = $this->input->post('months');
$day = $this->input->post('days');
$year = $this->input->post('years');
$birthday = date("d-m-Y",mktime(0,0,0,$month,$day,$year));
}
$this->form_validation->set_rules('address', 'Address', 'required|trim|xss_clean|strip_tags|min_length[10]');
$this->form_validation->set_rules('contact', 'Contact No', 'required|trim|xss_clean|strip_tags|numeric|min_length[8]|max_length[8]');
$this->form_validation->set_rules('email', 'Email', 'required|trim|valid_email|is_unique[users.email]|xss_clean|strip_tags');
$this->form_validation->set_rules('username', 'Username', 'required|trim|alpha_numeric|xss_clean|strip_tags|min_length[3]|max_length[20],is_unique[users.username');
$this->form_validation->set_rules('password', 'Password', 'required|trim|min_length[8]|xss_clean|strip_tags|alpha_numeric');
$this->form_validation->set_rules('cpassword', 'Confirm Password', 'required|trim|matches[password]|xss_clean|strip_tags|alpha_numeric');
if ($this->form_validation->run()){
$key = md5(uniqid());
$this->load->library('email', array('mailtype'=>'html'));
$this->load->model('model_users');
$this->email->from('admin#snt.website', "SWAP");
$this->email->to($this->input->post('email'));
$this->email->subject("Confirm your account.");
$message = "<p>Thank you for signing up!</p>";
$message .= "<p><a href='".base_url()."main/register_user/$key'>Click Here</a> to confirm your account</p>";
$this->email->message($message);
if ($this->model_users->add_temp_users($key, $birthday)){
if ($this->email->send()){
echo "The email has been sent!";
} else echo "Could not send the mail";
} else echo "problem adding to database";
} else {
$this->index;
}
}
}
I have checked through my codes and have no idea why does this error keep showing up:
If i am to remove all the validations it will work perfectly fine.Can someone help me with this problem please?

Answer 1

I think you wanted to write:
$this->index();
//^^ So you actually call the function index and not the property
instead of:
$this->index;