A thumbnail is a smaller version of an image. We use thumbnail to save download size & time for visitors. When a visitor visit a page with thumbnails, he can click on a thumbnail to see a larger version of the image. Thumbnails usually seen in any image gallery sites, online shopping, and many more
About a year ago I created a signature for use in forums. This sig is an image that display's the last 5 tutorials (or tips) that have been approved at CodeDemons. Because I have had many people asking me how I did this, I am going to explain. With this knowledge you can do just about anything with your sig. You will know how to pull any information from a database and drop it in an image. It does not even have to be a signature.
Imagine a scenario where you have an online photo album and the layout calls for drop shadows to be placed behind each image. It would be a hassle to manually add the shadow to each image... and actually modifying the original picture might not be possible depending on the circumstance. But if there're a few extra processor cycles available on the server, why not script the shadow using PHP?
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