This function will always return 0 on Windows, because Windows does not support numeric group IDs.
(PHP 4, PHP 5, PHP 7, PHP 8)
filegroup — Gets file group
Gets the file group. The group ID is returned in numerical format, use posix_getgrgid() to resolve it to a group name.
filenamePath to the file.
Returns the group ID of the file, or false if
an error occurs. The group ID is returned in numerical format, use
posix_getgrgid() to resolve it to a group name.
Upon failure, false is returned.
Upon failure, an E_WARNING is emitted.
Example #1 Finding the group of a file
<?php
$filename = 'index.php';
print_r(posix_getgrgid(filegroup($filename)));
?>Note: The results of this function are cached. See clearstatcache() for more details.
As of PHP 5.0.0, this function can also be used with some URL wrappers. Refer to Supported Protocols and Wrappers to determine which wrappers support stat() family of functionality.
This function will always return 0 on Windows, because Windows does not support numeric group IDs.