The function does not calculate groups, it sets groups access list of the current process in accordance to user information in /etc/groups.
Quote from Unix manual page for initgroups:
NAME
initgroups - initialize the supplementary group access list
...
DESCRIPTION
The initgroups() function initializes the group access list by reading the
group database /etc/group and using all groups of which user is a member.
The additional group group is also added to the list.
posix_initgroups
(PHP 5 >= 5.2.0, PHP 7, PHP 8)
posix_initgroups — Calculate the group access list
Description
Calculates the group access list for the user specified in name.
Parameters
-
username -
The user to calculate the list for.
-
group_id -
Typically the group number from the password file.
Return Values
Returns true on success or false on failure.
See Also
- The Unix manual page for initgroups(3).
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User Contributed Notes 1 note
victor dot kupiyanov at gmail dot com ¶
12 years ago
