how to create an image with a character

[Anon]

I tried to create a image with a character but failed, my code is shown as follow, can you help me, thx in advance!!!
<?
$new_w=100;
$new_h=100;

header("Content-type: image/gif");

$dst_img=ImageCreate($new_w,$new_h);
$white = imagecolorallocate($dst_img, 255, 255, 255);
$black= imagecolorallocate($dst_img, 0, 0, 0);

imagechar($dst_img, 1, 20, 20, "C", $black);
?>

[Anon]

First off make sure you have no white space in your document (for eg. there should be no space above the first <? )

second, you are not outputting the image to the browser:

so your last two lines before the ?> should be:

ImageGif($dst_img);
ImageDestroy($dst_img)