CUndo::CleanUpOld

static function CleanUpOld()
{
	global $DB, $CACHE_MANAGER;

	// All entries older than one day
	$timestamp = mktime(date("H"), date("i"), 0, date("m"), date("d") - 1, date("Y"));
	$DB->Query("delete from b_undo where TIMESTAMP_X <= ".$timestamp);

	$CACHE_MANAGER->CleanDir("b_undo");

	return "CUndo::CleanUpOld();";
}