hello everyone,
i want to know that as codes of html editing only work on phpbb2 and punbb in the general. so what if i put some codes there and after they work i convert my version to something else like invision, will this make any effect? the already affected code will keep working or stop? please clarify this

Of course it would make an effect. If you change the version of the forum, then you lose your template editing that you had that was in the previous phpbb2 or punbb version.