пример создания секторных диаграмм

                        
<?php

define("HEIGHT",200);

define("WIDTH",200);

$data=array(10,5,20,40,10,15);

$img=imagecreate(200, 200);

$background=$white=imagecolorallocate($img, 0xFF,0xFF,0xFF);

$black=imagecolorallocate($img, 0, 0, 0);

$center_x=(int)WIDTH/2;

$center_y=(int)HEIGHT/2;

imagerectangle($img, 0, 0, WIDTH-1, HEIGHT-1, $black);

$last=0;

foreach($data as $proc) {

$len=(360*$proc)/100;

imagefilledarc($img,

               $center_x,

               $center_y,

               WIDTH-20,

               HEIGHT-20,

               $last,

               ($last+$len),

               $black,

               IMG_ARC_EDGED | IMG_ARC_NOFILL);

$last +=$len;

}

header("Content-Type: image/png");

imagepng($img);

?>