Can I detect animated gifs using php and gd?

Question

I\'m currently running into some issues resizing images using GD.

Everything works fine until i want to resize an animated gif, which delivers the first frame on a b

Answer 1

Animated GIF must have the following string

"\x21\xFF\x0B\x4E\x45\x54\x53\x43\x41\x50\x45\x32\x2E\x30"

I've tested on a few animated gifs and it seem the string is at the pos 781 of a file (found with file_get_contents and strpos)