Hi
i have connected a mysql db to line chart but it doesn' work: the following
code i use
<html>
<head>
<script type="text/javascript"
src="https://www.google.com/jsapi";></script>
<script type="text/javascript"
src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript">
google.load("visualization", "1", {packages:["corechart"]});
google.setOnLoadCallback(drawChart);
function drawChart() {
var jsonData = $.ajax({
url: "getData.php",
dataType:"json",
async: false
}).responseText;
var data = new google.visualization.DataTable(jsonData);
var options = {
title: 'Company Performance',
curveType: 'function'
};
var chart = new
google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
</script>
</head>
<body>
<div id="chart_div" style="width: 900px; height: 500px;">Test</div>
</body>
</html>
<?php
//in der DB suchen
function getdb($SQL_statement){
$conn_host="localhost";
$conn_userid="root";
$conn_passwd="admin";
$conn_db="temperaturverlauf";
$db_conn = mysql_connect($conn_host,$conn_userid,$conn_passwd) or die
("Verbindung fehlgeschlagen ".mysql_error());
mysql_select_db($conn_db,$db_conn);
$resultset=mysql_query($SQL_statement);
return $resultset;
mysql_close();
}
//Letzte 24 Stunden
$sqlst=getdb("SELECT * FROM asdf LIMIT 0, 30;");
//echo "Daten gelesen";
$daten = array();
$daten[0] = array('Datum', 'Temperatur');
$i = 1;
while($data=mysql_fetch_array($sqlst)){
$daten[$i] = array($data['datum'], (double) $data['t0']);
$i = $i + 1;
}
$json = json_encode($daten);
echo $json;
?>
the php output is:
[["Datum","Temperatur"],["2014-02-11 12:42:55",21.9],["2014-02-11
12:42:55",21.9],["2014-02-11 12:42:55",21.8],["2014-02-11
12:42:55",21.7],["2014-02-11 12:42:55",21.7],["2014-02-11
12:42:55",21.6],["2014-02-11 12:42:55",21.6],["2014-02-11
12:42:55",21.5],["2014-02-11 12:42:55",21.4],["2014-02-11
12:42:55",21.4],["2014-02-11 12:42:55",21.3],["2014-02-11
12:42:55",21.2],["2014-02-11 12:42:55",21.2],["2014-02-11
12:42:55",21.1],["2014-02-11 12:42:55",21.1],["2014-02-11
12:42:55",21],["2014-02-11 12:42:55",20.9],["2014-02-11
12:42:55",20.9],["2014-02-11 12:42:55",20.8],["2014-02-11
12:42:55",20.7],["2014-02-11 12:42:55",20.7],["2014-02-11
12:42:55",20.6],["2014-02-11 12:42:55",20.6],["2014-02-11
12:42:55",20.5],["2014-02-11 12:42:55",20.4],["2014-02-11
12:42:55",20.4],["2014-02-11 12:42:55",20.3],["2014-02-11
12:42:55",20.2],["2014-02-11 12:42:55",20.2],["2014-02-11 12:42:55",20.1]]
an the output is table has no data, what is wrong?
thank's!!
--
You received this message because you are subscribed to the Google Groups
"Google Visualization API" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/google-visualization-api.
For more options, visit https://groups.google.com/groups/opt_out.
