Your JSON format is not correct for the Visualization API, and it will
cause IE to throw an error (due to an extra comma at the end of the array
of objects). Here's the correct format:
$table = array(
'cols' => array(
array('label' => 'priority', 'type => 'string'),
array('label' => 'num_count', 'type => 'number')
),
'rows' => array()
);
while ($row = mysql_fetch_assoc($result)) {
$table['rows'][] = array(
'c' => array(
array('v' => $row['priority']),
array('v' => $row['num_count'])
)
)
}
echo json_encode($table, JSON_NUMERIC_CHECK);
You can put the echo statement in your javascript for drawing the chart:
function drawChart () {
var data = new google.visualization.DataTable(<?php echo
json_encode($table, JSON_NUMERIC_CHECK); ?>);
var chart = new
google.visualization.PieChart(document.querySelector('#chart_div'));
chart.draw(data, {
// put the chart options in here
height: 400,
width: 600
});
}
google.load('visualization', '1', {packages: ['corechart'], callback:
drawChart});
and in your HTML, you need a div like this to put the chart in:
<div id="chart_div"></div>
On Saturday, November 16, 2013 5:00:15 PM UTC-5, Hugo Mendoza wrote:
>
> Hi there -
>
> I figured out how to put my data into a JSON format using PHP and MySQL,
> see below. Now, could someone please help me create, say, a pie chart with
> Google Charts. I have not done this before, and I could use some help
> creating it.
>
> <?php
> // Connect to MySQL
>
> include ("./mylibrary/login.php");
> login();
>
> // Fetch the data
> $query = "
> SELECT priority, COUNT(*) AS num_count\n"
> . " FROM issue\n"
> . " GROUP BY priority ";
>
> $result = mysql_query( $query );
>
> // All good?
> if ( !$result ) {
> // Nope
> $message = 'Invalid query: ' . mysql_error() . "\n";
> $message .= 'Whole query: ' . $query;
> die( $message );
> }
>
> // Print out rows
> $prefix = '';
> echo "[\n";
> while ( $row = mysql_fetch_assoc( $result ) ) {
> echo $prefix . " {\n";
> echo ' "priority": "' . $row['priority'] . '",' . "\n";
> echo ' "num_count": ' . $row['num_count'] . "\n";
> echo " }";
> $prefix = ",\n";
> }
> echo "\n]";
>
> ?>
>
> Thank you,
> Hugo
>
>
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