':expression', '', $test);
		}

		return $source;
	}

	/**
	 * Integer filter
	 *
	 * @param   string  $source  The string to be filtered
	 *
	 * @return  integer  The filtered value
	 */
	private function cleanInt($source)
	{
		$pattern = '/[-+]?[0-9]+/';

		preg_match($pattern, $source, $matches);

		return isset($matches[0]) ? (int) $matches[0] : 0;
	}

	/**
	 * Alias for cleanInt()
	 *
	 * @param   string  $source  The string to be filtered
	 *
	 * @return  integer  The filtered value
	 */
	private function cleanInteger($source)
	{
		return $this->cleanInt($source);
	}

	/**
	 * Unsigned integer filter
	 *
	 * @param   string  $source  The string to be filtered
	 *
	 * @return  integer  The filtered value
	 */
	private function cleanUint($source)
	{
		$pattern = '/[-+]?[0-9]+/';

		preg_match($pattern, $source, $matches);

		return isset($matches[0]) ? abs((int) $matches[0]) : 0;
	}

	/**
	 * Float filter
	 *
	 * @param   string  $source  The string to be filtered
	 *
	 * @return  float  The filtered value
	 */
	private function cleanFloat($source)
	{
		$pattern = '/[-+]?[0-9]+(\.[0-9]+)?([eE][-+]?[0-9]+)?/';

		preg_match($pattern, $source, $matches);

		return isset($matches[0]) ? (float) $matches[0] : 0.0;
	}

	/**
	 * Alias for cleanFloat()
	 *
	 * @param   string  $source  The string to be filtered
	 *
	 * @return  float  The filtered value
	 */
	private function cleanDouble($source)
	{
		return $this->cleanFloat($source);
	}

	/**
	 * Boolean filter
	 *
	 * @param   string  $source  The string to be filtered
	 *
	 * @return  boolean  The filtered value
	 */
	private function cleanBool($source)
	{
		return (bool) $source;
	}

	/**
	 * Alias for cleanBool()
	 *
	 * @param   string  $source  The string to be filtered
	 *
	 * @return  boolean  The filtered value
	 */
	private function cleanBoolean($source)
	{
		return $this->cleanBool($source);
	}

	/**
	 * Word filter
	 *
	 * @param   string  $source  The string to be filtered
	 *
	 * @return  string  The filtered string
	 */
	private function cleanWord($source)
	{
		$pattern = '/[^A-Z_]/i';

		return preg_replace($pattern, '', $source);
	}

	/**
	 * Alphanumerical filter
	 *
	 * @param   string  $source  The string to be filtered
	 *
	 * @return  string  The filtered string
	 */
	private function cleanAlnum($source)
	{
		$pattern = '/[^A-Z0-9]/i';

		return preg_replace($pattern, '', $source);
	}

	/**
	 * Command filter
	 *
	 * @param   string  $source  The string to be filtered
	 *
	 * @return  string  The filtered string
	 */
	private function cleanCmd($source)
	{
		$pattern = '/[^A-Z0-9_\.-]/i';

		$result = preg_replace($pattern, '', $source);
		$result = ltrim($result, '.');

		return $result;
	}

	/**
	 * Base64 filter
	 *
	 * @param   string  $source  The string to be filtered
	 *
	 * @return  string  The filtered string
	 */
	private function cleanBase64($source)
	{
		$pattern = '/[^A-Z0-9\/+=]/i';

		return preg_replace($pattern, '', $source);
	}

	/**
	 * String filter
	 *
	 * @param   string  $source  The string to be filtered
	 *
	 * @return  string  The filtered string
	 */
	private function cleanString($source)
	{
		return $this->remove($this->decode($source));
	}

	/**
	 * HTML filter
	 *
	 * @param   string  $source  The string to be filtered
	 *
	 * @return  string  The filtered string
	 */
	private function cleanHtml($source)
	{
		return $this->remove($source);
	}

	/**
	 * Path filter
	 *
	 * @param   string  $source  The string to be filtered
	 *
	 * @return  string  The filtered string
	 */
	private function cleanPath($source)
	{
		// Linux and other Unixoids
		$filePattern          = '(?:[^\x00\/:*?]{1,255})';
		$pathSeparatorPattern = '(?:\/+)';
		$rootPattern          = '(?:\/)';

		if ($this->pathMatches($source, $rootPattern, $pathSeparatorPattern, $filePattern, '/'))
		{
			return $source;
		}

		// Windows
		$filePattern          = '(?:[^\x00\\\\\/:*"?<>|]{1,255})';
		$pathSeparatorPattern = '(?:[\\\\\/])';
		$rootPattern          = '(?:[A-Za-z]:(\\\\|\/))';

		if ($this->pathMatches($source, $rootPattern, $pathSeparatorPattern, $filePattern, '\\'))
		{
			return $source;
		}

		return '';
	}

	/**
	 * Fix a path, if and only if it matches the provided patterns.
	 *
	 * If a path matches but is longer than 4095 bytes, it is cleared.
	 *
	 * @param   string  $source                The path as provided; it gets cleaned in place, if possible.
	 * @param   string  $rootPattern           The pattern to identify an absolute path (e.g., '/' on Linux, 'C:\' on Windows),
	 * @param   string  $pathSeparatorPattern  The pattern for valid path separators
	 * @param   string  $filePattern           The pattern for valid file and directory names
	 * @param   string  $pathSeparator         The native path separator
	 *
	 * @return boolean
	 */
	private function pathMatches(&$source, $rootPattern, $pathSeparatorPattern, $filePattern, $pathSeparator)
	{
		$pathPattern = "/^{$rootPattern}?(?:{$filePattern}{$pathSeparatorPattern})*{$filePattern}?$/u";

		if (preg_match($pathPattern, $source))
		{
			$source = preg_replace("/{$pathSeparatorPattern}/", $pathSeparator, $source);

			if (strlen($source) > 4095)
			{
				// Path is too long
				$source = '';
			}

			return true;
		}

		return false;
	}

	/**
	 * Trim filter
	 *
	 * @param   string  $source  The string to be filtered
	 *
	 * @return  string  The filtered string
	 */
	private function cleanTrim($source)
	{
		$result = trim($source);
		$result = StringHelper::trim($result, \chr(0xE3) . \chr(0x80) . \chr(0x80));
		$result = StringHelper::trim($result, \chr(0xC2) . \chr(0xA0));

		return $result;
	}

	/**
	 * Username filter
	 *
	 * @param   string  $source  The string to be filtered
	 *
	 * @return  string  The filtered string
	 */
	private function cleanUsername($source)
	{
		$pattern = '/[\x00-\x1F\x7F<>"\'%&]/';

		return preg_replace($pattern, '', $source);
	}
}
Error