Markdownify\Converter::strlen PHP Method

    protected function strlen($str)
    {
        if (function_exists('mb_strlen')) {
            return mb_strlen($str, 'UTF-8');
        } else {
            return preg_match_all('/[\\x00-\\x7F\\xC0-\\xFD]/', $str, $var_empty);
        }
    }