public static function getRootBackslash($pathname) {
        
        // Remove leading slash if necessary.
        if($pathname[0] == '\\') {
            $pathname = substr($pathname, 1);
        }

        // Create array from path
        $arr = explode('\\', $pathname);
        
        // If a pathname was given (as opposed to just a filename like "myFile.php")
        // Return the first part of it. Otherwise just return nothing for root.
        if (count($arr) > 1) {
            return $arr[0];
        }
        return '';
    }