codeigniter jQuery-File-Upload Controller

gistfile1.php

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

class Upload extends CI_Controller {


	function __construct()
	{
		parent::__construct();
		$this->load->helper(array('form', 'url'));
$this->load->database();
	}

	function index()
	{
		$this->load->view('form', array('error' => ' ' ));
	}

function do_upload()
	{
		$config['upload_path'] = './uploads/';
		$config['allowed_types'] = 'gif|jpg|png|jpeg';
		$config['max_size']	= '36000';
		$config['max_width']  = '10240';
		$config['max_height']  = '76800';

		$this->load->library('upload', $config);

		if ( ! $this->upload->do_upload())
		{
			$error = array('error' => $this->upload->display_errors());

			$this->load->view('form', $error);
		}
		else
		{
$uploaded = $this->upload->data();
$this->load->view('success', $data);

		}
	}
}
?>