(PHP 4, PHP 5, PHP 7, PHP 8)
chgrp — Changes file group
$filename, string|int $group): bool
Attempts to change the group of the file filename
to group.
Only the superuser may change the group of a file arbitrarily; other users may change the group of a file to any group of which that user is a member.
filenamePath to the file.
groupA group name or number.
Returns true on success or false on failure.
Example #1 Changing a file's group
<?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));
?>
Note: This function will not work on remote files as the file to be examined must be accessible via the server's filesystem.
Note: On Windows, this function fails silently when applied on a regular file.