SlightPHP\SphinxClient::_GetResponse PHP Method

    function _GetResponse($fp, $client_ver)
    {
        $response = "";
        $len = 0;
        $header = fread($fp, 8);
        if (strlen($header) == 8) {
            list($status, $ver, $len) = array_values(unpack("n2a/Nb", $header));
            $left = $len;
            while ($left > 0 && !feof($fp)) {
                $chunk = fread($fp, min(8192, $left));
                if ($chunk) {
                    $response .= $chunk;
                    $left -= strlen($chunk);
                }
            }
        }
        if ($this->_socket === false) {
            fclose($fp);
        }
        // check response
        $read = strlen($response);
        if (!$response || $read != $len) {
            $this->_error = $len ? "failed to read searchd response (status={$status}, ver={$ver}, len={$len}, read={$read})" : "received zero-sized searchd response";
            return false;
        }
        // check status
        if ($status == SEARCHD_WARNING) {
            list(, $wlen) = unpack("N*", substr($response, 0, 4));
            $this->_warning = substr($response, 4, $wlen);
            return substr($response, 4 + $wlen);
        }
        if ($status == SEARCHD_ERROR) {
            $this->_error = "searchd error: " . substr($response, 4);
            return false;
        }
        if ($status == SEARCHD_RETRY) {
            $this->_error = "temporary searchd error: " . substr($response, 4);
            return false;
        }
        if ($status != SEARCHD_OK) {
            $this->_error = "unknown status code '{$status}'";
            return false;
        }
        // check version
        if ($ver < $client_ver) {
            $this->_warning = sprintf("searchd command v.%d.%d older than client's v.%d.%d, some options might not work", $ver >> 8, $ver & 0xff, $client_ver >> 8, $client_ver & 0xff);
        }
        return $response;
    }