CI_Upload::limit_filename_length PHP Метод

    public function limit_filename_length($filename, $length)
    {
        if (strlen($filename) < $length) {
            return $filename;
        }
        $ext = '';
        if (strpos($filename, '.') !== FALSE) {
            $parts = explode('.', $filename);
            $ext = '.' . array_pop($parts);
            $filename = implode('.', $parts);
        }
        return substr($filename, 0, $length - strlen($ext)) . $ext;
    }