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Michael_Roempel

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  1. Many thanks for your quick help. That was an easy fix, if you know how to; I guess I have a long way ahead of me.
  2. Hello, I am new to pHp and javascript languages and I am trying to do some math calculations in pHp, then display the results with google charts. However, I got stuck with inserting data from pHp using json_encode. It works for the most simple array, with using 2 values. When using array of arrays, it does not work. I believe it could be a syntax errors with all those brackets but I could not figure it out. Thanks for any ideas! <?php // some arrays with dim 2x2 $testarr0 = array( 0.1, 2.5); $testarr = array( 1.0, 3.5); $testarr = array( $testarr0, $testarr ) ; // this is how it looks in pHp $json = json_encode($testarr); echo($json); echo '<br/>'; echo json_encode($json); ?> <html> <head> <script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"> </script> <script type="text/javascript"> google.charts.load('current', {'packages':['line']}); google.charts.setOnLoadCallback(drawChart); function drawChart() { var data = new google.visualization.DataTable(); data.addColumn('number', 'x values'); data.addColumn('number', 'y1 '); //var dataArray = <?php echo json_encode($testarr);?>; //document.body.innerHTML = " Data Array with json: " + dataArray ; // defining array here works well /* data.addRows( [ [0.1 ,2.5], [1.0 ,3.5] ] ); */ // this here does not work: data.addRow( <?php echo json_encode($testarr);?> ); // some options for the chart var options = { chart: { title: 'Points over time', }, width: 600, height: 400, axes: { x: { 0: {side: 'top'} } } }; var chart = new google.charts.Line(document.getElementById('line_top_x')); chart.draw(data, google.charts.Line.convertOptions(options)); } </script> </head> <body> <div id="line_top_x" style="width: 900px; height: 500px"></div> </body> </html>
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