pharext\ExecCmd::progress PHP Method

    private function progress($string, $flags)
    {
        static $counter = 0;
        static $symbols = ["\\", "|", "/", "-"];
        $this->output .= $string;
        if (false !== strpos($string, "\n")) {
            ++$counter;
        }
        return $flags & PHP_OUTPUT_HANDLER_FINAL ? "   \r" : sprintf("  %s\r", $symbols[$counter % 4]);
    }