This is a pie chart with the data array type 'text-data-single'. This data type is only used with pie charts. Each record in the data array simply contains a label (which is not used by PHPlot) and a segment size. In this example, we use the label to identify the data for our own reference, and then build a legend from those data labels along with the data values. This is useful because by default PHPlot labels the segments with only the percentage values. (Starting with PHPlot-5.6.0, there are new options for labels. See Section 5.41, “Example - Pie Chart Label Types”.)
Example 5.8. Pie Chart, text-data-single
<?php
# PHPlot Example: Pie/text-data-single
require_once 'phplot.php';
# The data labels aren't used directly by PHPlot. They are here for our
# reference, and we copy them to the legend below.
$data = array(
array('Australia', 7849),
array('Dem Rep Congo', 299),
array('Canada', 5447),
array('Columbia', 944),
array('Ghana', 541),
array('China', 3215),
array('Philippines', 791),
array('South Africa', 19454),
array('Mexico', 311),
array('United States', 9458),
array('USSR', 9710),
);
$plot = new PHPlot(800,600);
$plot->SetImageBorderType('plain');
$plot->SetPlotType('pie');
$plot->SetDataType('text-data-single');
$plot->SetDataValues($data);
# Set enough different colors;
$plot->SetDataColors(array('red', 'green', 'blue', 'yellow', 'cyan',
'magenta', 'brown', 'lavender', 'pink',
'gray', 'orange'));
# Main plot title:
$plot->SetTitle("World Gold Production, 1990\n(1000s of Troy Ounces)");
# Build a legend from our data array.
# Each call to SetLegend makes one line as "label: value".
foreach ($data as $row)
$plot->SetLegend(implode(': ', $row));
# Place the legend in the upper left corner:
$plot->SetLegendPixels(5, 5);
$plot->DrawGraph();