Sets the value of authgroupfile property. AuthGroupFile a file
containing names of the groups and usernames belonging to the group.
You must give full path to the group file in order for it to work.
Parameter
string $file - absolute pathname to the
group file.
<?php
require_once('File/HtAccess.php');
/* set the group file to /etc/htgroup */
$fh = new File_HtAccess('.htaccess');
$fh->load();
$fh->setAuthGroupFile('/etc/htgroup');
$fh->save();
?>
