jadebox - 9:38 pm on Sep 13, 2012 (gmt 0)
In spite of the examples in the documentation, I don't think that ImageMagik really writes EXIF data to the image. In your example, it's just saving a loading a property with "Exif" in the name, but not actually saving it in EXIF format.
Look at the PHP EXI Library (PEL):
PEL supports reading and writing of EXIF data.