expensive CGI request to generate the image, but it means you need
some mechanism to manage the files (for example, a cron job to delete
old files), and you need to make some directory under the document
-root writeable by the user that your web server runs CGI programs as,
+root writable by the user that your web server runs CGI programs as,
which may be a security concern.
Also, if you're generating large numbers of large images, you may end
<select name="font">
<option value="arial">Arial</option>
- <option value="arialb.ttf">Arial Bold</option>
+ <option value="arialb">Arial Bold</option>
...
</select>