code on a jpg image generated dynamically <p>While I was looking for some info, I came across this image on a forum which i didn't understood how it worked. Its a JPG image which actually tells you your ip address and your browser. I think that maybe it was made by modifying htacess and replacing PHP for JPG, and with PHP generating the image dynamically but I'm not sure about it.</p> <p>Would this be the way that this works?</p> <p>Here is the image i saw: <a href="http://www.danasoft.com/sig/475388.jpg" rel="nofollow">http://www.danasoft.com/sig/475388.jpg</a></p> <p>Thanks</p>