retentionMsecs(60000) ->duplicatePolicy(CommonArguments::POLICY_MAX) ->labels('sensor_id', 2, 'area_id', 32); $client->tscreate('temperature:2:32', $arguments); // 2. Add samples into time series $client->tsadd('temperature:2:32', 123123123123, 27); $client->tsadd('temperature:2:32', 123123123124, 28); $client->tsadd('temperature:2:32', 123123123125, 29); // 3. Retrieve a timestamp with highest timestamp $response = $client->tsget('temperature:2:32'); echo "Sample with highest timestamp - {$response[0]} and value - {$response[1]}";