PHP chgrp() Function

The PHP chgrp() function attempts to change the group ownership of the specified file. Only the superuser may change the group ownership of a file arbitrarily. Other users may change the group ownership of a file to any group of which that user is a member.

Note: This function doesn't work on remote files as the file to be examined must be accessible via the server's filesystem. On Windows, this function fails silently when applied on a regular file.

Syntax

chgrp(filename, group)

Parameters

`filename`	`Required.` Specify the path to the file to change group ownership for.
`group`	`Required.` Specify the new group by name or number.

Return Value

Returns true on success or false on failure.

Example:

Lets assume that we have a file called test.txt in the current working directory. The example below demonstrates on using this function to change its group ownership.

<?php
$file = 'test.txt';

//changing the group ownership of the file
if(chgrp($file, 8)){
  echo "Group ownership is successfully changed.\n";
} else {
  echo "Group ownership can not be changed.\n";
}
?>

The output of the above code will be:

Group ownership is successfully changed.

❮ PHP Filesystem Reference