siegmund wrote:

Also, the field "Date and time of data generation" is displayed as "15:41, 6 November 2005", i.e.,
apparently the current date and time. I think it should be "2005.10.25 12:56:28". That is when I
took the image. See dump of BumpassHell_8328.jpg below.

The image was processed on an iBook (OS10.3) using GraphicConverter 5.7.1. If there is a bug in
GraphicConverter, it would be helpful to have a short description so that I can submit a bug
report (http://www.lemkesoft.com).

0000000 377 330 377 340 \0 020 J F I F \0 001 001 001 \0 264
0000020 \0 264 \0 \0 377 341 036 f E x i f \0 \0 I I
0000040 * \0 6 034 \0 \0 C a n o n \0 C a n o
0000060 n P o w e r S h o t S 1 1 0
0000100 \0 264 \0 \0 \0 001 \0 \0 \0 264 \0 \0 \0 001 \0 \0
0000120 \0 2 0 0 5 : 1 0 : 2 5 1 2 : 5
0000140 6 : 2 8 \0 001 \0 \0 \0 003 \0 \0 H \0 \0
0000160 \0 \n \0 \0 \0 2 0 0 5 : 1 0 : 2 5
0000200 1 2 : 5 6 : 2 8 \0 2 0 0 5 : 1 0
0000220 : 2 5 1 2 : 5 6 : 2 8 \0 003 \0 \0

Created attachment 1054
var_dump() of array read from the file via exif_read_data()

The data as read from exif_read_data() is consistent with the output, eg:

["XResolution"]=>
string(21) "1124073500/1852796513"

(Tried with PHP 5.0.2, 5.0.5, and 5.1.0RC4)

Attached:

so, this is another PHP bug, i assume?

Hm... may this be byte order related? JPEG itself uses Motorola byte order,
afaik, but I don't know about the EXIF data contained.

Not too sure, but I did get the same results running the function on
my Mac as on my PC.

When I try extracting EXIF data from that image using PHP 4.3.8 (cgi) (built:
Jul 16 2004 08:32:27), I get a bunch of errors, and all the fields that return
garbage on the commons do not appear in the resulting array at all. Here are a
few of the errors i get:

Warning:  exif_read_data(BumpassHell_8328.jpg): process tag(x829D=FNumber

): Illegal pointer offset(x004F < x826252A)

Warning:  exif_read_data(BumpassHell_8328.jpg): process

tag(x9201=ShutterSpee): Illegal pointer offset(x0087 < x8262572)

Warning:  exif_read_data(BumpassHell_8328.jpg): process

tag(x9202=ApertureVal): Illegal pointer offset(x008F < x826257E)

Warning:  exif_read_data(BumpassHell_8328.jpg): process

tag(x9003=DateTimeOri): Illegal pointer offset(x0057 < x8262542)

Apperently, PHP chokes on this file really bad...

Created attachment 6156
Attaching linked image to make sure it doesn't disappear. :)

Just attaching the image for reference. Bug still visible on Commons.

Attached:

Ten years later: the values seen on Commons are correct. Must have been fixed at some point.