Comment::cleanCommentString PHP Method

    public function cleanCommentString($str)
    {
        $str = strip_tags(trim($str));
        if (strlen($str) > self::maxCommentBytes) {
            $str = substr($str, 0, self::maxCommentBytes);
        }
        $str = str_replace(array("\r\n", "\r"), "\n", $str);
        if (strpos($str, "\n\n\n") !== false) {
            $str = preg_replace('{\\n\\n\\n+}', "\n\n", $str);
        }
        return $str;
    }