This project is no longer maintained
Gif Creator is a PHP class that can be used to create animated GIF images, adapted from the gifmerge class by László Zsidi.
This version can compose animations using images of different formats that are converted to GIF and resized to the animation size before assembling the animation if necessary. These features use GD, if available, and are disabled if GD is unavailable.
It also supports custom horizontal and vertical offsets, transparency and disposal settings on a per-frame basis.
Also available on PHP Classes: