PHP Show images

Hello,

I send on regularly base some e-mailings to clients and I want to track the clicks in this e-mail.

On all the links in my mail I putted a special code after the link like www.mywebsite.com/article.php?id=person@site.com&newsletterid=5

Thanks to Google Analytics I can track all the clicks but I want something extra.

I know that its possible to also view when an image is viewed. I found an example with kind of the same link structure http://www.consoleshop.be/images/image.php?newsletterid=5&id=6686 but because its a PHP page I can’t see the source code.

Can anybody help me?