Credis_Client::read_reply PHP Method

    protected function read_reply($name = '')
    {
        $reply = fgets($this->redis);
        if ($reply === FALSE) {
            $info = stream_get_meta_data($this->redis);
            if ($info['timed_out']) {
                throw new CredisException('Read operation timed out.', CredisException::CODE_TIMED_OUT);
            } else {
                $this->connected = FALSE;
                throw new CredisException('Lost connection to Redis server.', CredisException::CODE_DISCONNECTED);
            }
        }
        $reply = rtrim($reply, CRLF);
        #echo "> $name: $reply\n";
        $replyType = substr($reply, 0, 1);
        switch ($replyType) {
            /* Error reply */
            case '-':
                if ($this->isMulti || $this->usePipeline) {
                    $response = FALSE;
                } else {
                    if ($name == 'evalsha' && substr($reply, 0, 9) == '-NOSCRIPT') {
                        $response = NULL;
                    } else {
                        throw new CredisException(substr($reply, 0, 4) == '-ERR' ? substr($reply, 5) : substr($reply, 1));
                    }
                }
                break;
                /* Inline reply */
            /* Inline reply */
            case '+':
                $response = substr($reply, 1);
                if ($response == 'OK' || $response == 'QUEUED') {
                    return TRUE;
                }
                break;
                /* Bulk reply */
            /* Bulk reply */
            case '$':
                if ($reply == '$-1') {
                    return FALSE;
                }
                $size = (int) substr($reply, 1);
                $response = stream_get_contents($this->redis, $size + 2);
                if (!$response) {
                    $this->connected = FALSE;
                    throw new CredisException('Error reading reply.');
                }
                $response = substr($response, 0, $size);
                break;
                /* Multi-bulk reply */
            /* Multi-bulk reply */
            case '*':
                $count = substr($reply, 1);
                if ($count == '-1') {
                    return FALSE;
                }
                $response = array();
                for ($i = 0; $i < $count; $i++) {
                    $response[] = $this->read_reply();
                }
                break;
                /* Integer reply */
            /* Integer reply */
            case ':':
                $response = intval(substr($reply, 1));
                break;
            default:
                throw new CredisException('Invalid response: ' . print_r($reply, TRUE));
                break;
        }
        // Smooth over differences between phpredis and standalone response
        switch ($name) {
            case '':
                // Minor optimization for multi-bulk replies
                break;
            case 'config':
            case 'hgetall':
                $keys = $values = array();
                while ($response) {
                    $keys[] = array_shift($response);
                    $values[] = array_shift($response);
                }
                $response = count($keys) ? array_combine($keys, $values) : array();
                break;
            case 'info':
                $lines = explode(CRLF, trim($response, CRLF));
                $response = array();
                foreach ($lines as $line) {
                    if (!$line || substr($line, 0, 1) == '#') {
                        continue;
                    }
                    list($key, $value) = explode(':', $line, 2);
                    $response[$key] = $value;
                }
                break;
            case 'ttl':
                if ($response === -1) {
                    $response = FALSE;
                }
                break;
        }
        return $response;
    }