php variable to google charts api no JSON

php variable to google charts api no JSON

I'm trying to pass a few PHP variables into a Google Chart, and I cannot
seem to get the syntax right. I don't want to invoke JSON (need I?).
Stock example: This works:
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load('visualization', '1.0', {'packages':['corechart']});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Number');
data.addColumn('number', 'Frequency');
data.addRows([
['Mushrooms', 3],
['Onions', 1],
['Olives', 1],
['Zucchini', 1],
['Pepperoni', 2]
]);
var options = {'title':'Title',
'width':400,
'height':300};
var chart = new
google.visualization.BarChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
</script>
However, this does not (assume all the same surrounding code)
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Number');
data.addColumn('number', 'Frequency');
data.addRows([
['Mushrooms', <?php echo $phpvariable ?>],
['Onions', 1],
['Olives', 1],
['Zucchini', 1],
['Pepperoni', 2]
]);
My thoughts: Positioning of the calculation of $phpvariable is wrong? or
do i just need to use JSON somehow, and PHP variables cannot be passed?
Thank you for your time