Path::validateCommon

static function validateCommon($path)
{
	if (!is_string($path))
	{
		return false;
	}

	if (trim($path) == "")
	{
		return false;
	}

	if (strpos($path, "") !== false)
	{
		return false;
	}

	if(preg_match("#(".self::INVALID_FILENAME_BYTES.")#", $path))
	{
		return false;
	}

	return true;
}