PHP : PEMBUAT PIE

class Pie
{
var $imageWidth = 400;
var $imageHeight = 300;
var $bgR = 255;
var $bgG = 255;
var $bgB = 255;
var $title = "Pie Chart - 123ashish.com";


function create($varDesc, $varValues)
{
Header("Content-type: image/png");
$image = ImageCreate($this->imageWidth, $this->imageHeight);

$bgcolor = ImageColorAllocate($image,
$this->bgR, $this->bgG, $this->bgB);

$white = ImageColorAllocate($image, 255, 255, 255);
$black = ImageColorAllocate($image, 0, 0, 0);
ImageFill($image, 0, 0, $bgcolor);

$num = 0;
foreach($varDesc as $v)
{
$r = rand (0, 255);
$g = rand (0, 255);
$b = rand (0, 255);

$sliceColors[$num] = ImageColorAllocate($image, $r, $g, $b);
$num++;
}

// now $num has the number of elements

// draw the box
ImageLine($image, 0, 0, $this->imageWidth - 1, 0, $black);
ImageLine($image, $this->imageWidth - 1, 0, $this->imageWidth - 1, $this->imageHeight - 1, $black);
ImageLine($image, $this->imageWidth - 1, $this->imageHeight - 1, 0, $this->imageHeight - 1, $black);
ImageLine($image, 0, $this->imageHeight - 1, 0, 0, $black);

$total = 0;
for ($x = 0; $x < $num; $x++)
{
$total += $varValues[$x];
}

// convert each slice into corresponding percentage of 360-degree circle
for ($x = 0; $x < $num; $x++)
{
$angles[$x] = ($varValues[$x] / $total) * 360;
}


for($x = 0; $x < $num; $x++)
{
// calculate and draw arc corresponding to each slice
ImageArc($image,
$this->imageWidth/4,
$this->imageHeight/2,
$this->imageWidth/3,
$this->imageHeight/3,
$angle,
($angle + $angles[$x]), $sliceColors[$x]);

$angle = $angle + $angles[$x];

$x1 = round($this->imageWidth/4 + ($this->imageWidth/3 * cos($angle*pi()/180)) / 2);
$y1 = round($this->imageHeight/2 + ($this->imageHeight/3 * sin($angle*pi()/180)) / 2);

// demarcate slice with another line
ImageLine($image,
$this->imageWidth/4,
$this->imageHeight/2,
$x1, $y1, $sliceColors[$x]);
}

// fill in the arcs
$angle = 0;
for($x = 0; $x < $num; $x++)
{
$x1 = round($this->imageWidth/4 +
($this->imageWidth/3 * cos(($angle + $angles[$x] / 2)*pi()/180)) / 4);
$y1 = round($this->imageHeight/2 +
($this->imageHeight/3 * sin(($angle + $angles[$x] / 2)*pi()/180)) / 4);

ImageFill($image, $x1, $y1, $sliceColors[$x]);

$angle = $angle + $angles[$x];
}


// put the desc strings
ImageString($image, 5, $this->imageWidth/2, 60, "Legend", $black);
for($x = 0; $x < $num; $x++)
{
$fl = sprintf("%.2f", $varValues[$x] * 100 / $total);
$str = $varDesc[$x]." (".$fl."%)";
ImageString($image, 3 , $this->imageWidth/2, ($x + 5) * 20, $str, $sliceColors[$x]);
}

// put the title
ImageString($image, 5, 20, 20, $this->title, $black);

ImagePng($image);
ImageDestroy($image);
}
}

$pie = new Pie;

if(isset($width))
{
$pie->imageWidth = $width;
}

if(isset($height))
{
$pie->imageHeight = $height;
}

if(isset($title))
{
$pie->title = $title;
}

$varDesc = explode(",", $desc);
$varValues = explode(",", $values);

$pie->create($varDesc, $varValues);
?>