GD lib, cirkel diagram

Kode 

<?
function cirkeldiagram($numbers, $names, $radius)
{
    reset($numbers);
    reset($names);
		
    $countNumbers = count($numbers);
    $countNames = count($names);
    $settingSizePrNameDescription = 15;
    $settingMargin = 5;
    $width = $settingMargin + (2 * $radius) + $settingMargin;
    $height = $settingMargin + (2 * $radius) + $settingMargin + ($settingSizePrNameDescription * $countNumbers) + $settingMargin;
    $centerCircle = round($width / 2);	
    $sumOfNumbers = array_sum($numbers);
    $degreesPrUnit = 360 / $sumOfNumbers;
    $numbersDegrees;
    $namesOnSlices;

    // billedet oprettes
    $img = imagecreatetruecolor($width, $height);

    // farver initialiseres
    $colorsWhite = imagecolorallocate($img, 0xFF, 0xFF, 0xFF);
    $colorsBlack = imagecolorallocate($img, 0x00, 0x00, 0x00);
    $colorsCircle[1] = imagecolorallocate($img, 0xFF, 0x00, 0x00);
    $colorsCircle[2] = imagecolorallocate($img, 0x00, 0xFF, 0x00);
    $colorsCircle[3] = imagecolorallocate($img, 0x00, 0x00, 0xFF);
    $colorsCircle[4] = imagecolorallocate($img, 0xFF, 0xFF, 0x00);
    $colorsCircle[5] = imagecolorallocate($img, 0xFF, 0x00, 0xFF);
    $colorsCircle[6] = imagecolorallocate($img, 0x00, 0xFF, 0xFF);
    $colorsCircle[7] = imagecolorallocate($img, 0xEE, 0xEE, 0xEE);
    $colorsCircle[8] = imagecolorallocate($img, 0xCC, 0xCC, 0xCC);
    $colorsCircle[9] = imagecolorallocate($img, 0x99, 0x99, 0x99);
    $colorsCircle[10] = imagecolorallocate($img, 0x66, 0x66, 0x66);
		
    // baggrundsfarve
    imagefilledrectangle($img, 0, 0, $width, $height, $colorsWhite);

    // selve cirklen tegnes
    imageellipse($img, $centerCircle, $centerCircle, 2 * $radius, 2 * $radius, $colorsBlack);

    foreach($numbers as $value)
    {
        $numbersDegrees[] = $value * $degreesPrUnit;
        $numbersProcentOfSum[] = number_format(($value/$sumOfNumbers) * 100, 2, ",", ".");
        $numbersTmp[] = $value;
    }
		
    foreach($names as $value)
    {
        $namesOnSlices[] = $value;
    }

    $indexColor = 1;
    $indexDegree = 0;

    foreach($numbersDegrees as $value)
    {
        $degree = $value + $indexDegrees;
        $indexDegrees = $degree;

        // koordinater til at farve cirkelafsnit beregnes i følgende afsnit kode
            // konvertér fra grader til radian
            $rad = deg2rad($indexDegrees);
            // x-koordinaten beregnes
            $x = (cos($rad) * ($radius - 5)) + $centerCircle;
            // y-koordinaten beregnes
            $y = (sin($rad) * ($radius - 5)) + $centerCircle;
            imagefilltoborder($img, $x, $y, $colorsBlack, $colorsCircle[$indexColor + 1]);	

        // koordinater til at tegne stregerne til afgrænsning af cirkelafsnit beregnes i følgende afsnit kode
            // konvertér fra grader til radian
            $rad = deg2rad($degree);
            $x = (cos($rad) * ($radius - 1)) + $centerCircle;
            $y = (sin($rad) * ($radius - 1)) + $centerCircle;
            imageline($img, $centerCircle, $centerCircle, $x, $y, $colorsBlack);			
        // koordinater til at tegne den sorte firkant farven til forklaring forklaringen af data
        imagerectangle($img, $settingMargin, (2 * $radius) + (2 * $settingMargin) + (($indexColor - 1) * $settingSizePrNameDescription), ($settingMargin) + 10, ((2 * $radius) + (2 * $settingMargin) + (($indexColor - 1) * $settingSizePrNameDescription)) + 10, $colorsBlack);

         // forklaringsboksene skal også have lidt farve
         imagefilltoborder($img, $settingMargin + 1, ((2 * $radius) + (2 * $settingMargin) + (($indexColor - 1) * $settingSizePrNameDescription)) + 1, $colorsBlack, $colorsCircle[$indexColor + 1]);

        // hvis der ikke er noget tilhørende navn
        if ($namesOnSlices[$indexColor - 1] == "")
        $namesOnSlices[$indexColor - 1] = $numbersTmp[$indexColor - 1];

        // info skrives
        imagestring($img, 2, 20, (2 * $radius) + (2 * $settingMargin) + (($indexColor - 1) * $settingSizePrNameDescription), $namesOnSlices[$indexColor - 1] . " (" . $numbersProcentOfSum[$indexColor - 1] . "%)", $colorsBlack);

        // næste!
        $indexColor++;			
    }

    // farver sidste slice – samme princip som alle de andre
    $rad = deg2rad(1);
    $x = (cos($rad) * ($radius - 5)) + $centerCircle;
    $y = (sin($rad) * ($radius - 5)) + $centerCircle;
    imagefilltoborder($img, $x, $y, $colorsBlack, $colorsCircle[2]);

    // billedet tegnes
    imagepng($img);
    imagedestroy($img);
}
// kunne kaldes på følgende måde:
//$stats = explode(",", $_GET["s"]);
//$navne = explode(",", $_GET["n"]);
//header("Content-type: image/png"); 
//cirkeldiagram($stats, $navne, $_GET["r"]);
?>

Kode 

<?

if(!$_SESSION['login'])
	{
	echo '<script>location.href = "index.php"</script>';
	}

?>

<table cellspan="0" cellpadding="0" border="0" width="100%">
<tr>
<td>
<img src="fil3.php" />
</td>
</tr>
</table>

Kode 

<?php
include_once("fil1.php");
$stats = "40,50";
$stats = explode(",", $stats);

$navne = "dansk,engelsk";
$navne = explode(",", $navne);

header("Content-type: image/png"); 
cirkeldiagram($stats, $navne, '50');
?>