Bug #64739 [Csd]: Invalid Title and Author data returned
Edit report at https://bugs.php.net/bug.php?id=64739&edit=1
ID: 64739
User updated by: php-qa at sebastianmendel dot de
Reported by: php-qa at sebastianmendel dot de
Summary: Invalid Title and Author data returned
Status: Closed
Type: Bug
Package: EXIF related
Operating System: Linux
PHP Version: 5.4.14
Assigned To: kalle
Block user comment: N
Private report: N
New Comment:
The problem is you never know which encoding is used and if you process a lot of pictures which are
always changing - in a CMS - you will always loose.
Ok, so at least the manual page should have a hint about this.
Previous Comments:
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[2017-07-21 19:41:35] kalle@php.net
I have given this some thought and attempts and trying to solve this in an automatic behavior, but
its almost impossible with the current implementation of EXIF in ext/exif. Therefore I recommend to
change the ini setting if the image contains another byte order than that of the default charset
used to decode it with.
TL;DR for your image you would therefore do:
exif.decode_unicode_motorola=UCS-2LE
Apologies again, but I don't see any other clear way to go about this
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[2017-07-14 01:37:50] kalle@php.net
I debugged it a little further, it seems that internally ext/exif detects the image byte order as
Motorola, which causes it to use a wrong encoding to process the tags (from the WINXP section).
A temporary hack can be done by modifying the exif.decode_unicode_motorola ini directive:
[exif]
exif.decode_unicode_motorola=UCS-2LE
(It defaults to UCS-2BE)
I'm gonna look into possible approaches for solving this
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[2017-07-13 23:15:01] kalle@php.net
Thank you Sebastian, from some quick debugging it seems that the Motorola/Intel offset is poorly
detected, causing it to read it as such
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[2017-07-13 12:35:34] php-qa at sebastianmendel dot de
link http://sebastianmendel.de/php/exif_segmentation_fault/test.jpg
restored
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[2017-07-07 10:28:15] kalle@php.net
Hi, could you please re-upload the image somewhere so I can use it for testing?
Thanks
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