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  • posix_getgrgid()

    (PHP 4, PHP 5, PHP 7)

    Return info about a group by group id

    说明

    posix_getgrgid(int $gid): array

    Gets information about a group provided its id.

    参数

    $gid

    The group id.

    返回值

    The array elements returned are:

    The group information array
    ElementDescription
    name The name element contains the name of the group. This is a short, usually less than 16 character "handle" of the group, not the real, full name.
    passwd The passwd element contains the group's password in an encrypted format. Often, for example on a system employing "shadow" passwords, an asterisk is returned instead.
    gid Group ID, should be the same as the$gidparameter used when calling the function, and hence redundant.
    members This consists of an array of string's for all the members in the group.

    范例

    Example use of posix_getgrgid()

    <?php
    $groupid   = posix_getegid();
    $groupinfo = posix_getgrgid($groupid);
    print_r($groupinfo);
    ?>
    

    以上例程的输出类似于:

    Array
    (
        [name]    => toons
        [passwd]  => x
        [members] => Array
            (
                [0] => tom
                [1] => jerry
            )
        [gid]     => 42
    )
    

    参见

    okies...
    This code should be considered as an OPTION only, it works under MY set of circumstances, and that is all I intended. The below funtion will return the NAME of the GROUP if provided with the Group ID#
     function RC_posix_getgrgid($gid) 
      {
      $LocationGroup = "/etc/group"; //EDIT THIS IF YOU HAVE A DIFFERENT OS. mine = debian
      $fp = fopen ("/etc/group","r");
      while ($groupinfo = fscanf ($fp, "%[a-zA-Z0-9]:x:%[0-9]:%[a-zA-Z0-9]\n")) 
        {
        list ($name, $groupID, $nfi) = $groupinfo;
        if ($groupID == $gid)
          {
          $returnval = $name;
          }
        }
      fclose($fp);
      if($returnval) { return $returnval; } else { return 0; }
      }
    When posix_getgrgid() fails (e.g. an invalid/unknown group id), it returns false.
    This is except for Mac OSX on which you get an array with name "nogroup" and gid of "-1".
    in php-4.3 the array returned seems to have changed.
    it now returns:
    ["name"] group name
    ["passwd"] group password
    ["members"] group members (array of usernames)
    ["gid"] numeric group id
    Returns an array containing the elements of the group structure. The array has both numeric indices, each of which is a string naming one member of the group, and named string indices. The array elements are:
    $_["name"] string groupname (users)
    $_["gid"] integer gidnumber (e.g. 0 for wheel/root)
    $_["members"] int number of users in group
    $_[0]..$_[n] string usernames in the group

    上篇:posix_getgid()

    下篇:posix_getgrnam()