[TYPO3-dev] Check if FE-User is member of a fe_user_group

[Andreas Förthner]

Hi list,

I am programming a FE-Plugin, that will show some data to the logged in 
User. The output should be different to different fe_user_groups. The 
ids of the groups are provided by TS.
Now what I need is a function that gives me all ids of the users that 
belong to a specific fe_user_group. Is something like that existant? I 
couldn't find an api for fe_authentication, perhaps I was just blind.

If there is no api, how do I have to process the blob field in the 
fe_users table, to find out if this user belongs to my group... or is 
there a sql function? I don't think so...

Thank you for your help!!!

Greetings

Andreas