Hey, I'm trying to use a global variable in the construction of my
chart, and I have 2 questions. First off, is there any way to get the
google charts server to ping me back with some debugging info? I have
no idea what I'm actually passing to the chart and it would be really
nice to know.
Secondly, How would I go about passing variables to the posted chart?
Currently I'm just including my file like so:
<?php
echo WP_PLUGIN_DIR . "/widget-dash-replace/index.php";
// Create some random text-encoded data for a line chart.
header('content-type: image/png');
$url = 'https://chart.googleapis.com/chart?chid=' .
md5(uniqid(rand(), true));
$chd = 't:';
global $data_array;
$x_values = array_keys($data_array);
$y_values = array_values($data_array);
$chd .= implode(',', $x_values);
$chd .= '|';
$chd .= implode(',', $y_values);
// Add data, chart type, chart size, and scale to params.
$chart = array(
'cht' => 'lxy',
'chs' => '500x200',
'chd' => $chd);
// Send the request, and print out the returned bytes.
$context = stream_context_create(
array('http' => array(
'method' => 'POST',
'content' => http_build_query($chart,'','&'))));
fpassthru(fopen($url, 'r', false, $context));
?>
and then parsing the data that I need as I go along. Is there a better
method to pass data to the img script? I'm not even sure this method
works at all.
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