Google Chart draws nothing using PHP array to send data - php

Question

I'm trying to take a array from PHP code returned from my CodeIgniter model/controllers and display at my page view. But, the chart is not generated, maybe because it's not getting the right data.
Here's my code:
<?php
$data = array(
$generateChart['A'],
$generateChart['B']
);
json_encode($data);
?>
<script type="text/javascript">
google.charts.load('current', {'packages':['corechart']});
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = google.visualization.DataTable();
data.addColumn('string', 'city');
data.addColumn('string', 'date');
data.addRows(<?php echo $data; ?>);
var options = {
};
var chart = new google.visualization.PieChart(document.getElementById('piechart'));
chart.draw(data, options);
}
</script>
<div class="row">
<div id="piechart" style="width: 900px; height: 500px;" class="col-md-4">
</div>
If I send this: I receive the data everything fine!
Created a new question more specific about my problem: Google Charts won't work if passing JSON data but works with fixed data

Answer 1

couple things...
see the data format for PieChart
first column should be 'string'
second a 'number'
'date' column is invalid
the array format from the comment won't work
you need an array for each row, which should have a value for each column
something like...
Array(
[0] => Array(
[0] => 10 - TATUÍ
[1] => 12
)
[1] => Array(
[0] => 1 - CONCÓRDIA
[1] => 13
)
[2] => Array(
[0] => 928 - PONTA GROSSA
[1] => 14
)
)