Hi,
I am trying to draw a line chart using *Google chart *in which data is
retrieved from mysql table.But i get the error as follows
Error: Invalid JSON string:
{"cols":[{"label":"id","type":"string"},{"label":"date","type":"string"}],"rows":["1","2013-08-13
00:00:00"]}{"cols":[{"label":"id","type":"string"},{"label":"date","type":"string"}],"rows":["2","2013-08-13
00:00:00"]}
the json encoded data looks as follows
{"cols":[{"label":"id","type":"string"},{"label":"date","type":"string"}],"rows":["1","2013-08-13
00:00:00"]}{"cols":[{"label":"id","type":"string"},{"label":"date","type":"string"}],"rows":["2","2013-08-13
00:00:00"]}
Here is the code which i used for line chart developement
<html>
<head>
<script type="text/javascript"
src="https://www.google.com/jsapi";></script>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="jquery-1.6.2.min.js"></script>
<script type="text/javascript">
google.load("visualization", "1", {packages:["corechart"]});
google.setOnLoadCallback(drawChart);
function drawChart() {
var jsonData = $.ajax({
url: "graph1.php",
dataType:"json",
async: false
}).responseText;
var data = new google.visualization.DataTable(jsonData);
var chart = new
google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, {width: 400, height: 240});
}
</script>
</head>
<body>
<div id="chart_div" style="width: 900px; height: 500px;"></div>
</body>
</html>
PHP part:
$sql = mysql_query("SELECT * FROM `da_insulin_details` LIMIT 0,2 ");
$rows['cols'] = array( array('label' => 'id', 'type' => 'string'),
array('label' => 'date', 'type' => 'string'));
while($row = mysql_fetch_array($sql))
{
$rows['rows'] [0] = $row['id'];
$rows['rows'][1] = $row['date'];
$jsonTable = json_encode($rows);
echo $jsonTable;
}
I am new to this section..anybody pls help me to solve the issue
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