Markdownify\Converter::wordwrap PHP Метод

    protected function wordwrap($str, $width, $break, $cut = false)
    {
        if (!$cut) {
            $regexp = '#^(?:[\\x00-\\x7F]|[\\xC0-\\xFF][\\x80-\\xBF]+){1,' . $width . '}\\b#';
        } else {
            $regexp = '#^(?:[\\x00-\\x7F]|[\\xC0-\\xFF][\\x80-\\xBF]+){' . $width . '}#';
        }
        $return = '';
        while (preg_match($regexp, $str, $matches)) {
            $string = $matches[0];
            $str = ltrim(substr($str, strlen($string)));
            if (!$cut && isset($str[0]) && in_array($str[0], array('.', '!', ';', ':', '?', ','))) {
                $string .= $str[0];
                $str = ltrim(substr($str, 1));
            }
            $return .= $string . $break;
        }
        return $return . ltrim($str);
    }