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Parameter $profile_vars

Expected type: Array
Description: An array of profile fields and their values (not used here?)

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Parameter $memID

Expected type: Integer
Description: The ID of the member whose groups are being changed

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Parameter $post_errors

Expected type: Array
Description: An array of one or more errors (not used here?)

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Return value

Expected type: Enumerated String
Description:

Possible string values
Allowed values	Description
'free'	Change was made to a "free" group
'primary'	The primary group changed
'request'	A change was made to a requestable group (requested to join)