(PHP 4, PHP 5, PHP 7)
chgrp — 锟侥憋拷锟侥硷拷锟斤拷锟斤拷锟斤拷锟斤拷
锟斤拷锟皆斤拷锟侥硷拷 filename 锟斤拷锟斤拷锟斤拷锟斤拷某锟�
group锟斤拷通锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 ID
指锟斤拷锟斤拷锟斤拷
只锟叫筹拷锟斤拷锟矫伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟睫革拷锟侥硷拷锟斤拷锟介，锟斤拷锟斤拷锟矫伙拷锟斤拷锟斤拷只锟杰斤拷锟侥硷拷锟斤拷锟斤拷某筛锟斤拷没锟斤拷约锟斤拷锟斤拷诘锟斤拷椤�
filename锟侥硷拷锟斤拷路锟斤拷锟斤拷
group锟斤拷锟斤拷锟斤拷苹锟斤拷锟斤拷帧锟�
锟缴癸拷时锟斤拷锟斤拷 TRUE锟斤拷 锟斤拷锟斤拷锟斤拷失锟斤拷时锟斤拷锟斤拷 FALSE锟斤拷
Example #1 锟侥憋拷锟侥硷拷锟斤拷锟斤拷锟斤拷锟斤拷
<?php
$filename = 'shared_file.txt';
$format = "%s's Group ID @ %s: %d\n";
printf($format, $filename, date('r'), filegroup($filename));
chgrp($filename, 8);
clearstatcache(); // do not cache filegroup() results
printf($format, $filename, date('r'), filegroup($filename));
?>