Transparant baggrund

<?php
header("Content-type: image/png");

class GDlib
{
    public function imageCreateTrueColor ($width, $height)
    {
        $this->resource = imageCreateTrueColor($width,$height);
    }
   
    public function __call ($name, $arguments)
    {
        $arguments = array_merge((array)$this->resource, (array)$arguments);
        call_user_func_array($name, $arguments);
    }
}

$gd = new GDlib;
$gd->imageCreateTrueColor(200,200);
$gd->imageSaveAlpha(true);
$gd->ImageAlphaBlending(false);

$gd->imagefill(0, 0, $gd->imagecolorallocatealpha(30, 30, 30, 127));

$gd->imagefilledellipse(100, 100, 50, 50, $gd->imagecolorallocate(255, 0, 0));

$gd->imagepng();
$gd->imagedestroy();

?>