upload code

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

/**
 * User class.
 *
 * @extends CI_Controller
 */
class User extends CI_Controller {

	/**
	 * __construct function.
	 *
	 * @access public
	 * @return void
	 */
	public function __construct() {

		parent::__construct();
		$this->load->library(array('session'));
		$this->load->helper(array('url'));
		$this->load->model('user_model');
	}


	public function index($username = false) {

		if ($username === false) {
			redirect(base_url());
			return;
		}

		// create the data object
		$data = new stdClass();
		$data->title = "$username Profile";

		// load the forum model
		$this->load->model('forum_model');

		// get user id from username
		$user_id = $this->user_model->get_user_id_from_username($username);

		// create the user object
		$user               = $this->user_model->get_user($user_id);
		$user->count_topics = $this->user_model->count_user_topics($user_id);
		$user->count_posts  = $this->user_model->count_user_posts($user_id);
		$user->latest_post  = $this->user_model->get_user_last_post($user_id);
		if ($user->latest_post !== null) {
			$user->latest_post->topic            = $this->forum_model->get_topic($user->latest_post->topic_id);
			$user->latest_post->topic->forum     = $this->forum_model->get_forum($user->latest_post->topic->forum_id);
			$user->latest_post->topic->permalink = base_url($user->latest_post->topic->forum->slug . '/' . $user->latest_post->topic->slug);
		} else {
			$user->latest_post = new stdClass();
			$user->latest_post->created_at = $user->username . ' has not posted yet';
		}
		$user->latest_topic = $this->user_model->get_user_last_topic($user_id);
		if ($user->latest_topic !== null) {
			$user->latest_topic->forum     = $this->forum_model->get_forum($user->latest_topic->forum_id);
			$user->latest_topic->permalink = base_url($user->latest_topic->forum->slug . '/' . $user->latest_topic->slug);
		} else {
			$user->latest_topic        = new stdClass();
			$user->latest_topic->title = $user->username . ' has not started a topic yet';
		}

		// create breadcrumb
		$breadcrumb  = '<ol class="breadcrumb">';
		$breadcrumb .= '<li><a href="' . base_url() . '">Home</a></li>';
		$breadcrumb .= '<li class="active">' . $username . '</li>';
		$breadcrumb .= '</ol>';

		// create a button to permit profile edition
		$edit_button = '<a href="' . base_url('user/' . $user->username . '/edit') . '" class="btn btn-xs btn-success">Edit your profile</a>';

		// assign created objects to the data object
		$data->user       = $user;
		$data->breadcrumb = $breadcrumb;
		if (isset($_SESSION['username']) && $_SESSION['username'] === $username) {
			// user is on his own profile
			$data->edit_button = $edit_button;
		} else {
			// user is not on his own profile
			$data->edit_button = null;
		}

		$this->template->load('user/profile/profile', $data);
	}

	/**
	 * register function.
	 *
	 * @access public
	 * @return void
	 */
	public function register() {

		// create the data object
		$data=array(
			'title' => 'Register'
		);

		// load form helper and validation library
		$this->load->helper('form');
		$this->load->library('form_validation');

		// set validation rules
		$this->form_validation->set_rules('username', 'Username', 'trim|required|alpha_numeric|min_length[4]|is_unique[users.username]', array('is_unique' => 'This username already exists. Please choose another one.'));
		$this->form_validation->set_rules('email', 'Email', 'trim|required|valid_email|is_unique[users.email]');
		$this->form_validation->set_rules('password', 'Password', 'trim|required|min_length[6]');
		$this->form_validation->set_rules('password_confirm', 'Confirm Password', 'trim|required|min_length[6]|matches[password]');

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

			// validation not ok, send validation errors to the view
			$this->template->load('register',$data);

		} else {

			// set variables from the form
			$username = $this->input->post('username');
			$email    = $this->input->post('email');
			$password = $this->input->post('password');

			if ($this->user_model->create_user($username, $email, $password)) {

				// user creation ok
				$this->template->load('register_success',$data);

			} else {

				// user creation failed, this should never happen
				$data['error'] =  'There was a problem creating your new account. Please try again.';

				// send error to the view
				$this->template->load('register',$data);

			}

		}

	}

	/**
	 * login function.
	 *
	 * @access public
	 * @return void
	 */
	public function login() {

		// create the data object
		$data=array(
			'title' => 'Login'
		);

		// load form helper and validation library
		$this->load->helper('form');
		$this->load->library('form_validation');

		// set validation rules
		$this->form_validation->set_rules('username', 'Username', 'required|alpha_numeric');
		$this->form_validation->set_rules('password', 'Password', 'required');

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

			// validation not ok, send validation errors to the view
			$this->template->load('login',$data);

		} else {

			// set variables from the form
			$username = $this->input->post('username');
			$password = $this->input->post('password');

			if ($this->user_model->resolve_user_login($username, $password)) {

				$user_id = $this->user_model->get_user_id_from_username($username);
				$user    = $this->user_model->get_user($user_id);

				// set session user datas
				$_SESSION['user_id']      = (int)$user->id;
				$_SESSION['username']     = (string)$user->username;
				$_SESSION['logged_in']    = (bool)true;

				// user login ok
				$this->template->load('login_success',$data);

			} else {

				// login failed
				$data['error'] = 'Wrong username or password.';

				// send error to the view
				$this->template->load('login',$data);

			}

		}

	}

	/**
	 * logout function.
	 *
	 * @access public
	 * @return void
	 */
	public function logout() {

		// create the data object
		$data=array(
			'title' => 'Logout'
		);

		if (isset($_SESSION['logged_in']) && $_SESSION['logged_in'] === true) {

			// remove session datas
			foreach ($_SESSION as $key => $value) {
				unset($_SESSION[$key]);
			}

			// user logout ok
			$this->template->load('logout_success',$data);

		} else {

			// there user was not logged in, we cannot logged him out,
			// redirect him to site root
			redirect('/');

		}

	}
	public function forget()
	{
	$data=array(
		'title' => 'Forgot'
	);
		if (isset($_GET['info'])) {
               $data['info'] = $_GET['info'];
              }
		if (isset($_GET['error'])) {
              $data['error'] = $_GET['error'];
              }
		$this->template->load('login_forget',$data);
	}

	public function doforget()
	{
		$this->load->helper('url');
		$email= $_POST['email'];
		$q = $this->db->query("select * from users where email=?",Array($email));
		$r = $q->result();
		if ($q->num_rows() > 0) {
			$user=$r[0];
			$this->resetpassword($user);
			$info= "Password has been reset and has been sent to email id: ". $email;
			redirect('/Login/forget?info=' . $info, 'refresh');
		} else {
			$error= "The email id you entered not found on our database ";
			redirect('/Login/forget?error=' . $error, 'refresh');
		}
	}
	/**
	 * edit function.
	 *
	 * @access public
	 * @param mixed $username (default: false)
	 * @return void
	 */
	public function edit($username = false) {

		// a user cann only edit his own profile
		if ($username === false || $username !== $_SESSION['username']) {
			redirect(base_url());
			return;
		}

		// create the data object
		$data = new stdClass();
		$data->title = "Edit Profile";

		// load form helper and form validation library
		$this->load->helper('form');
		$this->load->library('form_validation');

		// form validation
		$password_required_if = $this->input->post('password') ? '|required' : ''; // if there is something on password input, current password is required
		$this->form_validation->set_rules('username', 'Username', 'trim|min_length[4]|max_length[20]|alpha_numeric|is_unique[users.username]', array('is_unique' => 'This username already exists. Please choose another username.'));
		$this->form_validation->set_rules('email', 'Email', 'trim|valid_email|is_unique[users.email]', array('is_unique' => 'The email you entered already exists in our database.'));
	    if($this->input->post('password') AND $this->input->post('current_password') AND $this->input->post('password_confirm')){
			$this->form_validation->set_rules('current_password', 'Current Password', 'trim' . $password_required_if . '|callback_verify_current_password');

			$this->form_validation->set_rules('password', 'New Password', 'trim|min_length[6]|matches[password_confirm]');
			$this->form_validation->set_rules('password_confirm', 'Password Confirmation', 'trim|min_length[6]');
		}
		// get the user object
		$user_id = $this->user_model->get_user_id_from_username($username);
		$user    = $this->user_model->get_user($user_id);

		// create breadcrumb
		$breadcrumb  = '<ol class="breadcrumb">';
		$breadcrumb .= '<li><a href="' . base_url() . '">Home</a></li>';
		$breadcrumb .= '<li><a href="' . base_url('user/' . $username) . '">' . $username . '</a></li>';
		$breadcrumb .= '<li class="active">Edit</li>';
		$breadcrumb .= '</ol>';

		// assign objects to the data object
		$data->user       = $user;
		$data->breadcrumb = $breadcrumb;

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

			// validation not ok, send validation errors to the view
			$this->template->load('user/profile/edit', $data);

		} else {

			$user_id = $_SESSION['user_id'];
			$update_data = [];

			if ($this->input->post('username') != '') {
				$update_data['username'] = $this->input->post('username');
			}
			if ($this->input->post('email') != '') {
				$update_data['email'] = $this->input->post('email');
			}
			if ($this->input->post('password') != '') {
				$update_data['password'] = $this->input->post('password');
			}

			// avatar upload
			if (isset($_FILES['userfile']['name']) && !empty($_FILES['userfile']['name'])) {

				// setup upload configuration and load upload library
				$config['upload_path']      = './uploads/avatars/';
				$config['allowed_types']    = 'gif|jpg|png';
				$config['max_size']         = 2048;
				$config['max_width']        = 1024;
				$config['max_height']       = 1024;
				$config['file_ext_tolower'] = true;
				$config['encrypt_name']     = true;
				//get_instance()->load->library('upload', $config);
				$this->load->library('upload');
				$this->upload->initialize($config);

				if (!$this->upload->do_upload()) {

					// upload NOT ok
					$error = array('error' => $this->upload->display_errors());
					$this->load->view('upload_form', $error);
				} else {

					// Upload ok send name to $updated_data
					$update_data['avatar'] = $this->upload->data('file_name');

				}

			}

			// if everything is ok
			if ($this->user_model->update_user($user_id, $update_data)) {

				// if username change, update session
				if(isset($update_data['username'])) {
					$_SESSION['username'] = $update_data['username'];
					if ($this->input->post('username') != '') {
						// a little hook to send success message the new profil edit url if the username was updated
						$_SESSION['flash']    = 'Your profile has been successfully updated!';
					}
				}

				// fix the fact that a new avatar was not shown until page refresh
				if(isset($update_data['avatar'])) {
					$data->user->avatar = $update_data['avatar'];
				}

				if ($this->input->post('username') != '') {

					// redirect to the new profile edit url
					redirect(base_url('user/' . $update_data['username'] . '/edit'));

				} else {

					// create a success message
					$data->success = 'Your profile has been successfully updated!';

					// send success message to the views
					$this->template->load('user/profile/edit', $data);

				}

			} else {

				// update user not ok : this should never happen
				$data->error = 'There was a problem updating your account. Please try again.';

				//send errors to the views
				$this->template->load('user/profile/edit', $data);

			}

		}

	}

	/**
	 * delete function.
	 *
	 * @access public
	 * @param mixed $username (default: false)
	 * @return void
	 */
	public function delete($username = false) {

		// a user cann only delete his own profile and must be logged in
		if ($username == false || !isset($_SESSION['username']) || $username !== $_SESSION['username']) {
			redirect(base_url());
			return;
		}

		// create the data object
		$data = new stdClass();
		$data->title = "Delete Account";

		if ($_SESSION['username'] === $username) {

			// create breadcrumb
			$breadcrumb  = '<ol class="breadcrumb">';
			$breadcrumb .= '<li><a href="' . base_url() . '">Home</a></li>';
			$breadcrumb .= '<li><a href="' . base_url('user/' . $username) . '">' . $username . '</a></li>';
			$breadcrumb .= '<li class="active">Delete</li>';
			$breadcrumb .= '</ol>';

			$user_id          = $this->user_model->get_user_id_from_username($username);
			$data->user       = $this->user_model->get_user($user_id);
			$data->breadcrumb = $breadcrumb;

			if ($this->user_model->delete_user($user_id)) {

				$data->success = 'Your user account has been successfully deleted. Bye bye :(';

				// user delete ok, load views
				$this->template->load('user/profile/delete', $data);

			} else {

				// user delete not ok, this should never happen
				$data->error = 'There was a problem deleting your user account. Please contact an administrator.';

				// send errors to the views
				$this->template->load('user/profile/edit', $data);

			}

		} else {

			// a user cann only delete his own profile and must be logged in
			redirect(base_url());
			return;

		}

	}
	private function resetpassword($user)
	{
		date_default_timezone_set('GMT');
		$this->load->helper('string');
		$password= random_string('alnum', 16);
		$this->db->where('id', $user->id);
		$this->db->update('users',array('password' => $this->user_model->hash_password($password)));
		$this->load->library('email');
		$this->email->from('withussocialize@gmail.com', 'Socializewithus');
		$this->email->to($user->email);
		$this->email->subject('Password reset');
		$this->email->message('You have requested the new password, Here is you new password:'. $password);
		$this->email->send();
	}
}