php to highchart, how to send the right array? - php

Question

I made this code with:
https://github.com/influxdata/influxdb-php
https://www.highcharts.com/docs/working-with-data/live-data
<?php
include('/opt/lampp/htdocs/example/vendor/autoload.php');
$host = '127.0.0.1';
$port = 8086;
$dbname = 'aTimeSeries';
/*
$client = new \InfluxDB\Client($host, $port);
$database = $client->selectDB('aTimeSeries');
*/
//the exact same thing
$database = \InfluxDB\Client::fromDSN(sprintf('influxdb://user:pass#%s:%s/%s', $host, $port, $dbname));
//query of the last value
$result = $database->query('select * from valeurs group by * order by desc limit 1');
//recup le point
$points = $result->getPoints();
// Set the JSON header
header("Content-type: application/json");
// The x value is the current JavaScript time, which is the Unix time multiplied by 1000.
$x = time() * 1000;
// The y value is a random number
//$y = rand(0,100);
$y = $points;
// Create a PHP array and echo it as JSON
$ret = array($x, $y);
echo json_encode($ret);
?>
Output:
[1523603506000,[{"time":"2018-04-13T07:11:45.208943754Z","value":48}]]
But I would like this:
[1523603506000,48]
Or this:
[2018-04-13T07:11:45.208943754Z,48]
If I try to output $points only, I got only the last part of the array, but it is not what I would like either.
PS: if you have a better solution to do the same thing, maybe with nodeJS, I will surely listen

Answer 1

Thanks for your help,
I had another problem, but I solved it.
But still have 2 hours of lag, but it display right in highcharts now.
<?php
include('/opt/lampp/htdocs/example/vendor/autoload.php');
$host = '127.0.0.1';
$port = 8086;
$dbname = 'aTimeSeries';
//directly get the database object
$database = \InfluxDB\Client::fromDSN(sprintf('influxdb://user:pass#%s:%s/%s', $host, $port, $dbname));
//query of the last value
$result = $database->query('select * from valeurs group by * order by desc limit 1');
//get the point
$points = $result->getPoints();
//make the array right
$points = json_encode($points);
$points = json_decode($points);
//take only the seconds of the time
$points[0]->time = substr($points[0]->time, 0,20);
// Set the JSON header
header("Content-type: text/json");
// The x value is the current JavaScript time, which is the Unix time multiplied by 1000 and take the time
$x = strtotime($points[0]->time) * 1000;
// The y value take the value which is a random value
$y = $points[0]->value;
// Create a PHP array and echo it as JSON
$ret = array($x, $y);
echo json_encode($ret);
?>