<?xml version="1.0" standalone="no" ?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN"
    "http://www.w3.org/TR/2001/PR-SVG-20010719/DTD/svg10.dtd">
<svg width="400" height="400">
<!-- Pie chart sample -->
<path d="M200,200 L20,200 A180,180 0 0,0 338,320 z"
<!--                                 ^^^        -->
<!-- Para 0,0, żeby szedł po "długim" łuku      -->
    style="fill:#ff0000;
        fill-opacity: 1;
        stroke:black;
        stroke-width: 1"/>
<path d="M200,200 L338,320 A180,180 0 1,0 20,200 z"
    style="fill:#00ff00;
        fill-opacity: 1;
        stroke:black;
        stroke-width: 1"/>
</svg>

<?php

$szerokosc = 400;
$wysokosc  = 400;
$promien   = 180;
$dane      = array (10,10,10);
$kolory    = array ("white", "red", "green", "yellow", "black", "gray", "lime", "pink");
$suma      = array_sum($dane);

$M1  = $szerokosc / 2;
$M2  = $wysokosc / 2;

header ("Content-type: image/svg+xml");
echo ("<?xml version="1.0" standalone="no"?>");
echo ("<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">n");
echo ("<svg xmlns="http://www.w3.org/2000/svg" xml:space="preserve" width="400px" height="400px" shape-rendering="geometricPrecision" text-rendering="geometricPrecision" image-rendering="optimizeQuality" fill-rule="evenodd" clip-rule="evenodd" viewBox="0 0 400 400" xmlns:xlink="http://www.w3.org/1999/xlink">n");

for ($p=0; $p<count($dane); $p++) {
  $wartosc += $dane[$p];
  $kat = $wartosc / $suma;
  if ($p == 0){
    $L1  = ($szerokosc/2)-$promien;
    $L2  = ($szerokosc/2);
  } 
  else {
   $L1   = $CP1;
   $L2   = $CP2;
  }
  $CP1 = round(($szerokosc/2)-((cos((2 * pi()) * $kat)) * $promien),2);
  $CP2 = round(($szerokosc/2)-((sin((2 * pi()) * $kat)) * $promien),2);
  echo ("  <path stroke="black" stroke-width="3" fill="".$kolory[$p]."" d="");
  echo ("M".$M1.",".$M2." L".$L1.",".$L2." A".$promien.",".$promien.", 0 0,1 ".$CP1.",".$CP2." Z");
  echo (""/>n");
}

echo("</svg>n");

?>

for ($p=0; $p<count($dane); $p++) {
  $wartosc += $dane[$p];
  $kat = $wartosc / $suma;
  if ($p == 0){
    $L1  = ($szerokosc/2)-$promien;
    $L2  = ($szerokosc/2);
  } 
  else {
   $L1   = $CP1;
   $L2   = $CP2;
  }
  $CP1 = round(($szerokosc/2)-((cos((2 * pi()) * $kat)) * $promien),2);
  $CP2 = round(($szerokosc/2)-((sin((2 * pi()) * $kat)) * $promien),2);
  echo ("  <path w="".$wartosc."" stroke="black" stroke-width="3" fill="".$kolory[$p]."" d="");
  $test = $dane[$p] / $suma;
  if ($test > 0.5){
    echo ("M".$M1.",".$M2." L".$L1.",".$L2." A".$promien.",".$promien.", 0 1,1 ".$CP1.",".$CP2." Z");
  }
  else{
    echo ("M".$M1.",".$M2." L".$L1.",".$L2." A".$promien.",".$promien.", 0 0,1 ".$CP1.",".$CP2." Z");
  }
  echo (""/>n");
}