Finally it's over.
php code
$result = pg_query($db,"SELECT kv.ph, kv.date FROM public.kv ORDER BY date
DESC LIMIT 5");
$rows = array();
//flag is not needed
$flag = true;
$table = array();
$table['cols'] = array(
array('label' => 'date', 'type' => 'date'),
array('label' => 'ph', 'type' => 'number'),
);
$rows = array();
while($r = pg_fetch_assoc($result)) {
// assumes dates are in the format "yyyy-MM-dd"
$dateString = $r['date'];
$dateArray = explode('-', $dateString);
$year = $dateArray[0];
$month = $dateArray[1] - 1; // subtract 1 to convert to javascript's
0-indexed months
$day = $dateArray[2];
$temp = array();
$temp[] = array('v' => "Date($year, $month, $day)");
$temp[] = array('v' => (integer) $r['ph']);
$rows[] = array('c' => $temp);
}
$table['rows'] = $rows;
echo $jsonTable = json_encode($table);
/* echo $jsonTable; */
?>
HTML
<!DOCTYPE HTML>
<head>
<script
src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js";></script>
<script type="text/javascript"
src="https://www.gstatic.com/charts/loader.js";></script>
<script type="text/javascript"
src="https://www.google.com/jsapi";></script>
<script type="text/javascript">
google.charts.load('current', {packages: ['corechart', 'line']});
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var jsonData = $.ajax({
url: "getData2.php",
dataType: "json",
async: false
}).responseText;
var data = new google.visualization.DataTable(jsonData);
//data.addColumn('number', 'ph');
//data.addColumn('date', 'date');
//var obj = JSON.parse(jsonData);
//data.addRows(obj);
var options = {
title:'pH vrijednost zadnjih 5 mjerenja',
width: 1000, height: 300,
hAxis: {
title:'datum'
},
vAxis: {
title: 'pH'
},
};
var chart = new
google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
</script>
</head>
<body>
<!--Div that will hold the pie chart-->
<div id="text">graf</div>
<div id="chart_div"></div>
</body>
</html>
Result
<https://lh3.googleusercontent.com/-1QPKi-MtSzI/Wfrv2ZQqvjI/AAAAAAAABGI/jsG5DXVfWPUuILQzkVmMuW3xx6-D_tfrwCLcBGAs/s1600/Image%2B2.jpg>
Daniel thanks!
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