look here: you have syntax error
<?php echo json_encode($json['unemployment'), JSON_NUMERIC_CHECK)
$json['unemployment')
Domanda
I have a javascript file that imports Google Visualization to draw a line graph:
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript">
var inputData = [[1990,157894],[1991,173725],[1992,181227],[1993,183315]];
google.load("visualization", "1", {packages:["corechart"]});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('number', 'Year');
data.addColumn('number', 'January');
data.addRows(inputData);
var options = {
title: 'Unemployed Statistics'
};
var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
</script>
After
<?php
if (isset($_POST['submitted'])) {
I have an element that draws the graph:
<div id="chart_div" style="width: 900px; height: 500px;"></div>
This works fine and the graph is drawn fine with this. However, when I put my json variable into var inputData, no graph is drawn. It would look like this:
var inputData = <?php echo json_encode($json['unemployment'), JSON_NUMERIC_CHECK) ?>;
Why is nothing being drawn?
I run a print statement after I submit my form to check and see what <?php echo json_encode($json['unemployment') ?>
is. Here is the output: [[1990,131337],[1991,160256],[1992,188129]] .
This output looks like it should easily work with the var inputData variable in my javascript code. However, nothing gets drawn. Am I doing something wrong?
Soluzione
look here: you have syntax error
<?php echo json_encode($json['unemployment'), JSON_NUMERIC_CHECK)
$json['unemployment')