<?php 
session_start();
//Create an image generated by PHP
//Make sure there are no spaces outside the php script 
createImage(); 
exit(); 

function createImage() 
{   $value=$_SESSION['values'];
    //find total
	$total=0;
    foreach($value as $key=>$val) $total+=$val->amount; 
    //Set the image width and height: the pie will be 300x300, the legend on the right
    $width = 500; 
    $height = 300;  
    //Create the image resource 
    $image = ImageCreate($width, $height);  
	$n=0;
    //Define a few colors, and an array of colors
    $white = imagecolorallocate($image, 255, 255, 255);  
    $black = imagecolorallocate($image, 0, 0, 0); 
    $color[$n++] = imagecolorallocate($image, 255, 0, 0);  //red
	$color[$n++] = imagecolorallocate($image, 0, 0, 255); //blue
	$color[$n++] = imagecolorallocate($image,255, 255, 0); //yellow
	$color[$n++] = imagecolorallocate($image,0, 255, 0); //green
	$color[$n++] = imagecolorallocate($image,255, 255, 0); //magenta
	$color[$n++] = imagecolorallocate($image,0, 255, 255); //aqua
	imagefill($image, 0, 0, $white); //Make the background white
	$legendX=320;
	$legendY=20;
	$index=0;
	$angleStart=0;
	imagestring($image,5, $legendX, 0, 'LEGEND', $black);
	foreach($value as $key=>$val) {
		$text=$key.' $'.number_format($val->amount,0);
  		$percent=$total/$val->amount;
		$degrees=360/$percent;
		$angleEnd=$angleStart+$degrees;
		imagefilledarc($image,150,150,250,250,$angleStart,$angleEnd,$color[$index],0);
		imagefilledrectangle($image,$legendX,$legendY,$legendX+10,$legendY+10,$color[$index]);
		imagerectangle($image,$legendX,$legendY,$legendX+10,$legendY+10,$black); //border around the square
		imagestring($image,3, $legendX+13, $legendY, $text, $black);
		$legendY+=15;
		$index++;
		$angleStart=$angleEnd;
	}
	imageellipse($image,150,150,250,250,$black);//Add a black circle around the pie
	$text='Total: $'.number_format($total,0);
	imagestring($image,5, $legendX, $legendY+10,$text , $black); //
    header("Content-Type: image/jpeg"); //Tell browser filetype 
    imagejpeg($image); //Output the image as a jpeg 
    imagedestroy($image); //Free up resources
} 
?>