private function parseTxt($txt)
    {
        $result = [];
        $lines = array_map('trim', mb_split('\r\n|\n|\r', $txt));
        // Parse each line individually
        foreach ($lines as $key => $line) {
            // Limit rule length
            $line = mb_substr($line, 0, self::MAX_LENGTH_RULE);
            // Remove comments
            $line = explode('#', $line, 2)[0];
            // Parse line
            $result[] = $this->parseLine($line);
            unset($lines[$key]);
        }
        return in_array(true, $result, true);
    }