26273PHP+GD Progress Bar Demohttp://db.org/demo/progress-demo.phpThis demo shows how to create dynamic progress bar images using the PHP GD functions. To learn how it works, check out the source for the demo and the source for the script creating the images.PHP > Tips and Tutorials > Image ManipulationOct 15, 2006
This tutorial focuses on a thumbnail generation script I wrote for the Accidental President site. Rather than generating a smaller representation of the image, it cuts out a section of the photograph to create an obscure snapshot of the photo itself. The thumbnail's size is variable also, so the script be used across different sites to create different sized thumbnails where needed.
Often, tutorials covering the GD libraries and it's available functions in PHP will show how to overlay text onto images, manipulate images (resize, flip, rotate, etc) or how to dynamicly generate charts or graphs from numerical data. I have not seen many demonstrating how to combine images (or moreso, placing a transparent forground image over a background image).
Many people do not realize that PHP can be used to create non-HTML data. This is especially useful for creating images on the fly. It could be simple bar graphs that display data from a database, or even simpler, just a way to create graphic buttons on the fly.
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