how to create a snapshot of web page
I'm trying to figure out how to generate snapshot, thumbnail-like images of live web pages on the Internet. The images will be used to preview text links, appearing when you mouse over the links.
The problem is that I can't figure out how the web site snapshots were created. Can you use PHP to do this, perhaps using the image functions?
If you can use PHP to accomplish the snapshot images, I'd appreciate anyone who could steer me in the right direction here. Some sample code illustrating how this is done -- or a tutorial -- would help.