Highcharts/PHP/JS newbie here. I am having trouble formatting the required data array ($data) to feed into Highcharts. The embedded php code outputs a datetime/decimal data array of the form
[1388680500000, 11215], [1388680800000, 11334], [1388681100000, 11487], [1388681400000, 11600], [1388681700000, 11641], [1388682000000, 11648], [1388682300000, 11692], [1388682600000, 11641], [1388682900000, 11715], [1388683200000, 11808], [1388683500000, 11845], [1388683800000, 11813], [1388684100000, 11771], [1388684400000, 11746], [1388684700000, 11808], [1388685000000, 11784], [1388685300000, 11727], [1388685600000, 11608], [1388685900000, 11648], [1388686200000, 11587], [1388686500000, 11555], [1388686800000, 11596], [1388687100000, 11541], [1388687400000, 11441], [1388687700000, 11393], [1388688000000, 11340], [1388688300000, 11152], [1388688600000, 11031], [1388688900000, 10920], [1388689200000, 10681], [1388689500000, 10221], [1388689800000, 9895]
I am currently manually copying this data (in []) into the series: data: field which successfully generates the chart (see below). I have tried to replace the data field with series: [{ data: [] however the chart is no longer created. (as per http://www.highcharts.com/docs/working-with-data/preprocessing-data-from-a-database)
I have also tried many iterations of json_encode($data) in the php and JS but to no avail. I would be very grateful to anyone who could show me the exact translation of of the php output into the Highcharts data field, preferably using JSON.
<!DOCTYPE html>
<html>
<head>
<title></title>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script src="http://code.highcharts.com/highcharts.js"></script>
<script src="http://code.highcharts.com/modules/exporting.js"></script>
<?php
//the usual stuff
error_reporting(-1);
$con = mysql_connect("localhost","root","");
if (!$con) {
die('Could not connect: ' . mysql_error());
}
mysql_select_db("test", $con);
$result = mysql_query("SELECT unix_timestamp(DATETIMES), TEST FROM PT");
$data = array();
while ($row = mysql_fetch_array($result)) {
extract($row);
$row[0]=1000*$row[0];
$data[] = "[$row[0], $row[1]]";
}
mysql_close($con);
echo join($data, ', ');
?>
<script>
$(function() {
Highcharts.setOptions({
chart: {
backgroundColor: 'rgba(255, 255, 255, .9)',
borderWidth: 2,
plotBackgroundColor: 'rgba(255, 255, 255, .9)',
plotShadow: true,
plotBorderWidth: 1
}
});
var chart1 = new Highcharts.Chart({
chart: {
renderTo: 'container',
},
xAxis: {
type: 'datetime'
},
series: [{
data: [[1388680500000, 11215], [1388680800000, 11334], [1388681100000, 11487], [1388681400000, 11600], [1388681700000, 11641], [1388682000000, 11648], [1388682300000, 11692], [1388682600000, 11641], [1388682900000, 11715], [1388683200000, 11808], [1388683500000, 11845], [1388683800000, 11813], [1388684100000, 11771], [1388684400000, 11746], [1388684700000, 11808], [1388685000000, 11784], [1388685300000, 11727], [1388685600000, 11608], [1388685900000, 11648], [1388686200000, 11587], [1388686500000, 11555], [1388686800000, 11596], [1388687100000, 11541], [1388687400000, 11441], [1388687700000, 11393], [1388688000000, 11340], [1388688300000, 11152], [1388688600000, 11031], [1388688900000, 10920], [1388689200000, 10681], [1388689500000, 10221], [1388689800000, 9895]],
pointStart: 0,
pointInterval: 3600 * 1000 // one hour
}]
});
});
</script>
</head>
<body>
<div id="container" style="height: 300px"></div>
</body>
</html>
EDIT:
I have rejigged the script into the following format, however the chart no longer plots at all... I am sure that the JSON format is correct. Please help!
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Highcharts Example</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
var options = {
chart: {
renderTo: 'container',
type: 'line',
marginRight: 130,
marginBottom: 25
},
title: {
text: 'test',
x: -20 //center
},
subtitle: {
text: '',
x: -20
},
xAxis: {
categories: []
},
yAxis: {
title: {
text: 'Amount'
},
plotLines: [{
value: 0,
width: 1,
color: '#808080'
}]
},
tooltip: {
formatter: function() {
return '<b>'+ this.series.name +'</b><br/>'+
this.x +': '+ this.y;
}
},
legend: {
layout: 'vertical',
align: 'right',
verticalAlign: 'top',
x: -10,
y: 100,
borderWidth: 0
},
series: []
}
$.getJSON("data.php", function(json) {
options.xAxis.categories = json['category'];
options.series[0].name = json['name'];
options.series[0].data = json['data'];
chart = new Highcharts.Chart(options);
});
});
</script>
<script src="http://code.highcharts.com/highcharts.js"></script>
<script src="http://code.highcharts.com/modules/exporting.js"></script>
</head>
<body>
<div id="container" style="min-width: 400px; height: 400px; margin: 0 auto"></div>
</body>
</html>
