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Request #65187 exif_read_data : add support for stream resource
Submitted: 2013-07-02 21:47 UTC Modified: 2017-07-12 03:48 UTC
Votes:5
Avg. Score:4.6 ± 0.8
Reproduced:5 of 5 (100.0%)
Same Version:2 (40.0%)
Same OS:2 (40.0%)
From: imprec at gmail dot com Assigned: kalle (profile)
Status: Closed Package: EXIF related
PHP Version: Irrelevant OS:
Private report: No CVE-ID: None
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 [2013-07-02 21:47 UTC] imprec at gmail dot com 
Description:
------------
exif_read_data currently read exif metadata only from filepath. 

In case the image is in memory (stream resource, binary string, etc...) the image 
as to be written on disk before reading the exif data.

It would be awesome to be able to read from a stream resource.

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 [2013-07-18 11:38 UTC] imprec at gmail dot com
-Status: Open +Status: Closed
 [2013-07-18 11:38 UTC] imprec at gmail dot com 
Closing it as it's actually already supported via 

exif_read_data('data://image/jpeg;base64,'.base64_encode(file_get_contents('image.
jpg')))
 [2013-11-25 13:10 UTC] maggus dot staab at googlemail dot com 
while the posted example will work, it requires a lot memory on php-side because you need to read the whole file + you need additional space for the base64 encoded string.

so its far away from an efficient solution and will not work for big/huge images.
 [2013-11-25 13:13 UTC] imprec at gmail dot com
-Status: Closed +Status: Open
 [2013-11-25 13:13 UTC] imprec at gmail dot com 
After reading the comment of maggus dot staab at googlemail dot com, I reopen the ticket
 [2016-08-03 10:04 UTC] kalle@php.net
-Status: Open +Status: Assigned -Assigned To: +Assigned To: kalle
 [2016-08-03 10:04 UTC] kalle@php.net 
It seems like all the exif_* functions do not support streams, I'm gonna take a look at it
 [2016-08-05 04:08 UTC] kalle@php.net 
I'm currently working on a patch, and a side thing that is coming out of this is an additional $context parameter for use with non streams, since internally PHP is creating a stream with no context, this can help work around supplying direct addresses like locations thats gated by custom protocols or HTTPS which would need peer verification or similar.

I expect this patch to only go in PHP 7.2 and onwards.
 [2017-07-12 03:45 UTC] kalle@php.net
-Status: Assigned +Status: Closed
 [2017-07-12 03:45 UTC] kalle@php.net 
I have just implemented this in master, it will be available as of PHP 7.2.0 Beta 1!

Thanks for helping PHP become EVEN greater!
 [2017-07-12 03:48 UTC] kalle@php.net 
ps, it also works for exif_thumbnail()
 
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