ismemberof vs. in_array?

[James]

I've noticed ismemberof is a helper function for checking usergroups, but what makes this beneficial over the PHP function in_array()?

AFAIK, ismemberof doesn't actually support multiple usergroup checking, so wouldn't it be better practice to use in_array($var, array(values)) instead of multiple ismemberof checks?

 

[Shadab]

Because...

Secondary usergroup id's are stored as a comma separated list in the secondary_group_ids field;