Bug->Doc #64739 [Csd->Asn]: Invalid Title and Author data returned

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: Closed +Status: Assigned -Type: Bug +Type: Documentation Problem Package: EXIF related Operating System: Linux PHP Version: 5.4.14 Assigned To: kalle Block user comment: N Private report: N New Comment: I totally agree with you on this, possibly having to iterate charsets just to make it decode is non sense to me as well. I will update the docs accordingly Side note: I'm working on a new extension to see if it can replace the exif one at one point if you are interested, keep in mind its very basic: http://github.com/KalleZ/pecl-exifkit Previous Comments: ------------------------------------------------------------------------ [2017-07-22 13:51:03] php-qa at sebastianmendel dot de 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. ------------------------------------------------------------------------ [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 ------------------------------------------------------------------------ [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 ------------------------------------------------------------------------ [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 ------------------------------------------------------------------------ [2017-07-13 12:35:34] php-qa at sebastianmendel dot de link http://sebastianmendel.de/php/exif_segmentation_fault/test.jpg restored ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=64739 -- Edit this bug report at https://bugs.php.net/bug.php?id=64739&edit=1