CWebDavFile::_copy_props

function _copy_props($fromID, $toID, $move=false)
{
	$pathFrom = $this->__prop_file_name($fromID);
	if (file_exists($pathFrom))
	{
		$pathTo = $this->__prop_file_name($toID);
		if (!$move)
			@copy($pathFrom, $pathTo);
		else
			@rename($pathFrom, $pathTo);
	}
}