File upload in FuelPHP

gistfile1.php

<!-- app/views/files/select.php -->
<p>Select</p>
<?php if (isset($html_error)): ?>
    <?= $html_error; ?>
<?php endif; ?>

<?= Form::open(array('action' => 'files/upload', 'enctype' => 'multipart/form-data')); ?>

<div>
    <?= Form::label('ファイル', 'uploadfile'); ?>
</div>
<div>
    <?= Form::file('uploadfile'); ?>
</div>
<div>
    <?= Form::submit('submit', '送信'); ?>
</div>
<?= Form::close(); ?>

gistfile2.php

<?php
/* app/classes/controller/files.php */

class Controller_Files extends Controller_Template
{

    public function action_select()
	{
		$this->template->title = 'Files &raquo; Select';
		$this->template->content = View::forge('files/select');
	}

	public function action_upload()
	{
        Upload::process(array('path' => Config::get('upload.path')));

        if (Upload::is_valid())
        {
            Upload::save();
        }
        else
        {
            $this->template->content = View::forge('files/select');

            $html_error = '';
            foreach (Upload::get_errors() as $error) $html_error .= $error['errors'][0]['message'] . '<br />';
            $this->template->content->set_safe('html_error', $html_error);
            return;
        }

		$this->template->title = 'Files &raquo; Uploaded';
		$this->template->content = View::forge('files/upload');
	}

}