Описание
string
exif_thumbnail ( string filename [, int &width [, int &height [, int &imagetype]]] )
exif_thumbnail() reads the embedded thumbnail of a
TIFF or JPEG image.
If you want to deliver thumbnails through this function, you should send
the mimetype information using the header() function.
It is possible that exif_thumbnail() cannot create an
image but can determine its size. In this case, the return value is
FALSE but width and height
are set.