ChartDirector Ver 4.1 (PHP Edition)

Pie Chart with Legend




This example demonstrates how to add a legend box to a pie chart. It also demonstrates the use of alternative sector label format.

Source Code Listing

[File: phpdemo/legendpie.php]
<?php
require_once("../lib/phpchartdir.php");

# The data for the pie chart
$data = array(25, 18, 15, 12, 8, 30, 35);

# The labels for the pie chart
$labels = array("Labor", "Licenses", "Taxes", "Legal", "Insurance", "Facilities",
    "Production");

# Create a PieChart object of size 450 x 240 pixels
$c = new PieChart(450, 240);

# Set the center of the pie at (150, 100) and the radius to 80 pixels
$c->setPieSize(150, 100, 80);

# Add a title at the bottom of the chart using Arial Bold Italic font
$c->addTitle2(Bottom, "Project Cost Breakdown", "arialbi.ttf");

# Draw the pie in 3D
$c->set3D();

# add a legend box where the top left corner is at (330, 40)
$c->addLegend(330, 40);

# modify the label format for the sectors to $nnnK (pp.pp%)
$c->setLabelFormat("{label} \${value}K\n({percent}%)");

# Set the pie data and the pie labels
$c->setData($data, $labels);

# Explode the 1st sector (index = 0)
$c->setExplode(0);

# output the chart
header("Content-type: image/png");
print($c->makeChart2(PNG));
?>