Animated CAPTCHA
László Zsidi implemented an interesting alternative for captchas to make it much more difficult to break if not impossible using animated gifs. The PHP class generates a sequence of animated images, assembled with in a GIF animation file, to make it more difficult to break by robots because the validation text does not completely appear in each of the animation images. The text length, color and font are configurable. The class is the October 2006 Winner of the innovation award by phpclasses.org.
