The chgrp Function
The chgrp function changes the group for the specified file. The first parameter of the function is the file path, the second is the name or ID of the new group. Appropriate permissions are required for the function to execute successfully.
Syntax
chgrp(string $filename, string|int $group): bool
Example
Let's change the group of the file 'test.txt' to 'www-data':
<?php
$res = chgrp('test.txt', 'www-data');
var_dump($res);
?>
Code execution result:
true
Example
Let's try to change the group of a non-existent file:
<?php
$res = chgrp('nonexistent.txt', 'www-data');
var_dump($res);
?>
Code execution result:
false
Example
Using a numeric group ID instead of a name:
<?php
$res = chgrp('test.txt', 33); // 33 is a typical ID for the www-data group
var_dump($res);
?>
Code execution result:
true
