getReadConnectionDescription example

public function readLine(): string
    {
        if (feof($this->out)) {
            return '';
        }

        $line = fgets($this->out);
        if ('' === $line || false === $line) {
            $metas = stream_get_meta_data($this->out);
            if ($metas['timed_out']) {
                throw new TransportException(sprintf('Connection to "%s" timed out.', $this->getReadConnectionDescription()));
            }
            if ($metas['eof']) {
                throw new TransportException(sprintf('Connection to "%s" has been closed unexpectedly.', $this->getReadConnectionDescription()));
            }
        }

        $this->debug .= sprintf('< %s', $line);

        return $line;
    }