Bug #64739 [Opn]: Invalid Title and Author data returned

From: Date: Thu, 13 Jul 2017 23:15:06 +0000
Subject: Bug #64739 [Opn]: Invalid Title and Author data returned
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-210046@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=64739&edit=1

 ID:                 64739
 Updated by:         kalle@php.net
 Reported by:        php-qa at sebastianmendel dot de
 Summary:            Invalid Title and Author data returned
 Status:             Open
 Type:               Bug
 Package:            EXIF related
 Operating System:   Linux
 PHP Version:        5.4.14
 Block user comment: N
 Private report:     N

 New Comment:

Thank you Sebastian, from some quick debugging it seems that the Motorola/Intel offset is poorly
detected, causing it to read it as such


Previous Comments:
------------------------------------------------------------------------
[2017-07-13 12:35:34] php-qa at sebastianmendel dot de

link http://sebastianmendel.de/php/exif_segmentation_fault/test.jpg
restored

------------------------------------------------------------------------
[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

------------------------------------------------------------------------
[2016-08-05 06:29:55] kalle@php.net

@cweiske, you are right. This picture linked is stored in Motorola byte order which qualifies as big
endian. This image has no makernote tag so I guess it was made from an editor (Paint.NET) and it
also correctly identifies it as a motorola byte order in the COMPUTED section.

Of all the data returned, it indeed seems to only be the title and author that is somehow corrupted.

------------------------------------------------------------------------
[2013-04-30 15:35:52] cweiske@php.net

Reason is probably that the exif data were stored on a PowerPC Mac and have big endianess.

------------------------------------------------------------------------
[2013-04-30 07:06:21] php-qa at sebastianmendel dot de

Description:
------------
exif_read_data returns invalid Titel and Author data.

ExifTool cli returns valid data.

Test script:
---------------
php-5.4.14 -r "var_dump(exif_read_data('http://sebastianmendel.de/php/exif_segmentation_fault/test.jpg'));"


Expected result:
----------------
  ....
  ["Title"]=>
  string(8) "55845364"
  ["Author"]=>
  string(13) "100420.000000"
  ....

Actual result:
--------------
  ....
  ["Title"]=>
  string(8) "????????"
  ["Author"]=>
  string(13) "?????????????"
  ....


------------------------------------------------------------------------



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