Create a 3D pie chart with GD library

chart_3dpie.php

<?php
/**
* 3D pie chart with GD library 
*
**/

// Create an image
$image = imagecreatetruecolor(100, 100);

// Allocate some colors
$white    = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
$gray     = imagecolorallocate($image, 0xC0, 0xC0, 0xC0);
$darkgray = imagecolorallocate($image, 0x90, 0x90, 0x90);
$navy     = imagecolorallocate($image, 0x00, 0x00, 0x80);
$darknavy = imagecolorallocate($image, 0x00, 0x00, 0x50);
$red      = imagecolorallocate($image, 0xFF, 0x00, 0x00);
$darkred  = imagecolorallocate($image, 0x90, 0x00, 0x00);

// Make the 3D effect
for ($i = 60; $i > 50; $i--) {
    imagefilledarc($image, 50, $i, 100, 50, 0,   45, $darknavy, IMG_ARC_PIE);
    imagefilledarc($image, 50, $i, 100, 50, 45,  75, $darkgray, IMG_ARC_PIE);
    imagefilledarc($image, 50, $i, 100, 50, 75, 360, $darkred,  IMG_ARC_PIE);
}

imagefilledarc($image, 50, 50, 100, 50,  0,  45, $navy, IMG_ARC_PIE);
imagefilledarc($image, 50, 50, 100, 50, 45,  75, $gray, IMG_ARC_PIE);
imagefilledarc($image, 50, 50, 100, 50, 75, 360, $red,  IMG_ARC_PIE);

//Flush the image
header('Content-type: image/png');
imagepng($image);
imagedestroy($image);

?>

PhpFiddle.org sample file