posix_initgroups()

(PHP 5 >= 5.2.0, PHP 7)

Calculate the group access list

说明

posix_initgroups(string $name,int $base_group_id): bool

Calculates the group access list for the user specified in name.

参数

$name

The user to calculate the list for.

$base_group_id

Typically the group number from the password file.

返回值

成功时返回TRUE，或者在失败时返回FALSE。

参见

• The Unix manual page for initgroups(3).

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.