File Manager

<?php
/*
* 2007-2014 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Open Software License (OSL 3.0)
* that is bundled with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://opensource.org/licenses/osl-3.0.php
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@prestashop.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
* versions in the future. If you wish to customize PrestaShop for your
* needs please refer to http://www.prestashop.com for more information.
*
*  @author PrestaShop SA <contact@prestashop.com>
*  @copyright  2007-2014 PrestaShop SA
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

class AddConfToFile
{
	public $fd;
	public $file;
	public $mode;
	public $error = false;
	
	public function __construct($file, $mode = 'r+')
	{
		$this->file = $file;
		$this->mode = $mode;
		$this->checkFile($file);
		if ($mode == 'w' AND !$this->error)
			if (!$res = @fwrite($this->fd, '<?php'."\n"))
				$this->error = 6;
	}
	
	public function __destruct()
	{
		if (!$this->error)
			@fclose($this->fd);
	}
	
	private function checkFile($file)
	{
		if (!$fd = @fopen($this->file, $this->mode))
			$this->error = 5;
		elseif (!is_writable($this->file))
			$this->error = 6;
		$this->fd = $fd;
	}
	
	public function writeInFile($name, $data)
	{
		if (!$res = @fwrite($this->fd,
			'define(\''.$name.'\', \''.$this->checkString($data).'\');'."\n"))
		{
			$this->error = 6;
			return false;
		}
		return true;
	}
	
	public function writeEndTagPhp()
	{
		if (!$res = @fwrite($this->fd, '?>'."\n")) {
			$this->error = 6;
			return false;
		}
		return true;
	}
	
	public function checkString($string)
	{
		if (get_magic_quotes_gpc())
			$string = stripslashes($string);
		if (!is_numeric($string))
		{
			$string = addslashes($string);
			$string = strip_tags(nl2br($string));
		}
		return $string;
	}
}