php image text

header("Content-type: image/png");
$pic = imagecreatetruecolor (390, 300) or die ("Das generieren des Bildes ist zur Zeit nicht möglich");
imageantialias($pic, true);
$trans = imagecolorallocatealpha($pic, 255, 255, 255, 0);
imagecolortransparent($pic, $trans);
$gray = imagecolorallocate($pic, 64, 64, 64);
$black = imagecolorallocate($pic, 0, 0, 0);
imagefill($pic, 0, 0, $trans);
ImageTTFText($pic, 20, 0, 5, 0, $black,
 "http://sett.bplaced.net/other/fonts/arial.ttf",  'Text');
imagepng($pic);