How is it done - Image with browser details on signature

Question regarding how an image get details

[kenchix1]

I've seen several forum signature where an image displays details such as the browser type and the ip address of the user. I'm really curious how is it done. What I wanted to accomplish is instead of displaying the IP address and browser type, I'd like to display random quotations coming from my database. Then I'll use it as a signature to other forums.

I'm not sure if this is the right forum, if not please move my thread to proper forum.

Thanks. :)

[kenchix1]

BTW, I saw it at Danasoft.

[jatar_k]

I assume it is an include, probably js, so more likely a script tag

[coopster]

Getting text from the visitor is as simple as pulling values from the corresponding PHP superglobals [php.net]. Then, you can either overlay it using markup or if you truly want to embed it in the image you can use the PHP Image Functions [php.net] to write the information on the image.