GRAPH PHP COURBE DE CHARGE

<?php

if (isset($_GET['height']))
	$height = $_GET['height'];
else
	$height = 45;
	
if (isset($_GET['color1']))
	$color1 = $_GET['color1'];
else
	$color1 = "209F0B";

if (isset($_GET['color2']))
	$color2 = $_GET['color2'];
else
	$color2 = "60D154";
	
if (isset($_GET['color3']))
	$color3 = $_GET['color3'];
else
	$color3 = "404040";
	
if (isset($_GET["value"]))
	{
	$value = $_GET["value"];

	$addval=0;
	$valuearray = explode(",", $value);
	$width = count($valuearray);
	$addval=max($valuearray);
		
		$moyadd=floor($addval/$height);
		for($i=0;$i<($width+1);$i++)
		{
			$newvalue=floor($valuearray[$i]/$moyadd);
			$value2[$i] = $height-$newvalue;
		}	
	}
$values[0] = 0;
$values[1] = $height;
for($i=0;$i<($width+1);$i++)
{ 
	$values[$i*2+2] = $i;
	$values[$i*2+3] = $value2[$i];
}
$values[(($width*2)+2)] = (($width*2)+1);
$values[(($width*2)+3)] = $height+1;


//);	


$image = imagecreatetruecolor(($width+2), $height+1);


$rouge1 = hexdec(substr($color1,0,2));
$vert1 = hexdec(substr($color1,2,2));
$bleu1 = hexdec(substr($color1,4,2));

$rouge2 = hexdec(substr($color2,0,2));
$vert2 = hexdec(substr($color2,2,2));
$bleu2 = hexdec(substr($color2,4,2));

$rouge3 = hexdec(substr($color3,0,2));
$vert3 = hexdec(substr($color3,2,2));
$bleu3 = hexdec(substr($color3,4,2));

$line   = imagecolorallocate($image, $rouge1, $vert1, $bleu1);
$bg = imagecolorallocate($image, $rouge2, $vert2, $bleu2);
$borderl = imagecolorallocate($image, $rouge3, $vert3, $bleu3);

imagefilledpolygon($image, $values, ($width+2), $bg);
imagepolygon($image, $values, ($width+2), $line);
imagerectangle($image, 0, 0, $width+1, $height, $borderl);

header('Content-type: image/png');
imagecolortransparent($image,0);
imagepng($image);
imagedestroy($image);

?>