PHPDaemon\Clients\IMAP\Connection::decodeGetUniqueId PHP Method

    protected function decodeGetUniqueId($lines)
    {
        $uids = [];
        foreach (array_map([$this, 'decodeLine'], $lines) as $tokens) {
            if (!isset($tokens[1]) || $tokens[1] !== 'FETCH') {
                continue;
            }
            if (!isset($tokens[2][0]) || $tokens[2][0] !== 'UID') {
                continue;
            }
            if (!isset($tokens[0]) || !isset($tokens[2][1])) {
                continue;
            }
            $uids[$tokens[0]] = $tokens[2][1];
        }
        return $uids;
    }