Pie Chart

carbonize

Feb 19th, 2013

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<?php
ob_start();
// First we creat the image
$pie = imagecreatetruecolor(130, 130);
// Now lets define some colours
$col[0] = imagecolorallocate($pie,255,0,0); // red
$col[1] = imagecolorallocate($pie,0,128,0); // green
$col[2] = imagecolorallocate($pie,255,255,0); // yellow
$col[3] = imagecolorallocate($pie,0,0,128); // navy
$col[4] = imagecolorallocate($pie,255,0,255); // fushcia
$col[5] = imagecolorallocate($pie,0,128,128); // teal
$col[6] = imagecolorallocate($pie,192,192,192); // silver
$col[7] = imagecolorallocate($pie,128,0,0); // maroon
$col[8] = imagecolorallocate($pie,0,255,0); // lime
$col[9] = imagecolorallocate($pie,128,128,0); // olive
$col[10] = imagecolorallocate($pie,0,0,255); // blue
$col[11] = imagecolorallocate($pie,128,0,128); // purple
$col[12] = imagecolorallocate($pie,0,255,255); // aqua
$col[13] = imagecolorallocate($pie,128,128,128); // gray
$col[14] = imagecolorallocate($pie,255,255,255); // white used for the background which we then make transparent
$col[15] = imagecolorallocate($pie,0,0,0); // black
// Fill the image then make it transparent
imagecolortransparent($pie, $col[14]);
imagefill($pie,0,0,$col[14]);
$percentages = (!empty($_GET['pers'])) ? explode(',', $_GET['pers']) : '';
if(!is_array($percentages))
{
imagestring($pie, 5, 50, 50, 'no percentages provided', $col[15]);
}
else
{
// Set the start degree
$x = 0;
// Now loop through our percentages
for ($z=0, $c=count($percentages); $z<$c; $z++)
{
$degrees = (($percentages[$z]/100)*360);
$color = imagecolorallocate($pie,mt_rand(20,255),mt_rand(20,255),mt_rand(20,255));
imagefilledarc($pie,65,65,125,125,$x,($x+$degrees),$col[$z],IMG_ARC_PIE);
$x+=$degrees;
}
}
header("Content-type: image/gif");
imagegif($pie);
echo trim(ob_get_clean());
imagedestroy($pie);
?>

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