(PHP 5 >= 5.2.0, PHP 7, PHP 8)
posix_initgroups — Calculate the group access list
$username
, int $group_id
): boolCalculates the group access list for the user specified in name.
username
The user to calculate the list for.
group_id
Typically the group number from the password file.
Returns true
on success or false
on failure.