Checking if someone is a moderator

[MrApples]

How would I check if a someone is a moderator of a specific forum with PHP?

I've tried this but it's not parsing correctly on the foreach argument...

PHP Code:

function forum_is_moderated($fid){
    global $vbulletin, $imodcache;
    foreach ($imodcache["$fid"] AS $moderator)
    {
        if ( $vbulletin->userinfo['userid']; == $moderator['userid'] ) {
            return 1;
        } 
// For first mod        else {
// For first mod            return 0;
// For first mod        }
    
    }
}