protected function splitFile($path, $lines = null)
    {
        Deprecation::notice('5.0', 'splitFile is deprecated, please process files using a stream');
        $previous = ini_get('auto_detect_line_endings');

        ini_set('auto_detect_line_endings', true);

        if (!is_int($lines)) {
            $lines = $this->config()->get("lines");
        }

        $new = $this->getNewSplitFileName();

        $to = fopen($new, 'w+');
        $from = fopen($path, 'r');

        $header = null;

        if ($this->hasHeaderRow) {
            $header = fgets($from);
            fwrite($to, $header);
        }

        $files = array();
        $files[] = $new;

        $count = 0;

        while (!feof($from)) {
            fwrite($to, fgets($from));

            $count++;

            if ($count >= $lines) {
                fclose($to);

                // get a new temporary file name, to write the next lines to
                $new = $this->getNewSplitFileName();

                $to = fopen($new, 'w+');

                if ($this->hasHeaderRow) {
                    // add the headers to the new file
                    fwrite($to, $header);
                }

                $files[] = $new;

                $count = 0;
            }
        }

        fclose($to);

        ini_set('auto_detect_line_endings', $previous);

        return $files;
    }