$_GET['size'] = 44;
$_GET['text'] = "Hello, world!";
$size = imagettfbbox($_GET['size'], 0, "ARIAL", $_GET['text']);
$xsize = abs($size[0]) + abs($size[2]);
$ysize = abs($size[5]) + abs($size[1]);
$image = imagecreate($xsize, $ysize);
$blue = imagecolorallocate($image, 0, 0, 255);
$white = ImageColorAllocate($image, 255,255,255);
imagettftext($image, $_GET['size'], 0, abs($size[0]), abs($size[5]), $white,"ARIAL", $_GET['text']);
header("content-type: image/png");
imagepng($image);
imagedestroy($image);
?>