CForumCacheManager::ClearTag

static function ClearTag($type, $ID=0)
{
	global $CACHE_MANAGER;
	static $forum = "forum_";
	static $topic = "forum_topic_";

	if ($type === "F" && $ID > 0)
	{
		$CACHE_MANAGER->ClearByTag($forum.$ID);
	}
	elseif ($type === "T" && $ID > 0)
	{
		$CACHE_MANAGER->ClearByTag($topic.$ID);
	}
	else if ($type !== "F" && $type !== "T")
	{
		$CACHE_MANAGER->ClearByTag($type);
	}
}