Photo uploading site - anyway to watermark photos?

I just created a photo uploading site, and was wondering if there are any good scripts to watermark photos that are uploaded. Thanks

 

this should be helpful i hope you know php

http://www.sitepoint.com/article/watermark-images-php

http://www.litewebsite.com/?c=19

 

do you use custom script?
if not, there is plenty scripts that have watermarking feature built in.

 

Thanks, what im using is the Mihalism photo hosting script. Is there a way to watermark the photos as people upload them to the site?

 

It would require additional coding works. People might charge $40 - $70 for that to be done, based on what I see on DP.