(PHP 5 >= 5.2.0, PHP 7)
posix_initgroups — Calculate the group access list
$name
, int $base_group_id
) : boolCalculates the group access list for the user specified in name.
nameThe user to calculate the list for.
base_group_idTypically the group number from the password file.
成功时返回 TRUE， 或者在失败时返回 FALSE。