CTempFile::GetAbsoluteRoot

static function GetAbsoluteRoot()
{
	$io = CBXVirtualIo::GetInstance();

	if(defined('BX_TEMPORARY_FILES_DIRECTORY'))
	{
		return rtrim(BX_TEMPORARY_FILES_DIRECTORY, '/');
	}
	else
	{
		return $io->CombinePath(
			$_SERVER["DOCUMENT_ROOT"],
			COption::GetOptionString("main", "upload_dir", "upload"),
			"tmp"
		);
	}
}