posix_initgroups

    (PHP 5 >= 5.2.0, PHP 7, PHP 8)

    posix_initgroups — Calculate the group access list

    Description

    posix_initgroups(string $username, int $group_id): bool

    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

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    victor dot kupiyanov at gmail dot com
    12 years ago
    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.
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