空白页面的原因

<?php 
class Customer extends CI_controller
{

public function __construct()
{
    parent::__construct();
    $this->load->model('Customer_model');


}
public function create()
{

    $this->load->helper('form');
    $this->load->library('form_validation');
    $this->form_validation->set_rules('name', 'Title', 'required');
    $this->form_validation->set_rules('address', 'text', 'required');

    if ($this->form_validation->run() === FALSE)
    {

    $this->load->helper('url');
    $this->load->view('templates/header');  
    $this->load->view('master/customer');

    }
    else
    {
    $this->Customer_model->register();

    $this->load->view('templates/header');
    $this->load->view('templates/success');
    }
    }
}

I have inserted data successfully to the table using this code. After I have tried to display the same header template and the center part (success.php) it is showing a blank page. After commenting the header page it is working I.E. The success page is coming.

I think you need to load the helper also above it:

$this->load->helper('url');