Adding / removing membergroupids
 

I have a script that I would like to integrate with vbulletin as far as adding and removing a membergroup id when necessary. Is there a way to accomplish this? Should I go about it the way I would for a regular array or is there some other way?

A bit difficult to answer if we don't know what "a script" is.

I apologize, it's a custom script on my site that I made, a membership area outside of the forum. I've just decided to use the array functions and array_filter to remove the memberships when they are no longer apart of that group.

Still don't really get what you are trying to do? Use permissions in an external script?

Not permissions. When they join the membership area outside of the forum they are automatically added to a group on the forum that coincides with the outside area, and then when they are no longer a part of that membership, they are no longer a part of that group on the forum.

So no, not permissions. Just being a part of a usergroup by joining something outside of the forum.