Getting EXIF data from external images (http URLs)

[Alfonso Acosta]

Hi all,


exif_read_data( ) doesn't support URLs
(http://php.net/manual/en/function.exif-read-data.php ) but I would
like to do that with the minimum traffic and overhead possible.


A naive solution would be downloading the whole target file locally and
then call exif_read_data( ) but that means a lot of overhead traffic
considering I only want the exif header.

My approach would be getting just the header but

1) Did anyone implement it already?

2) Is it possible? Any suggestions/advices about how to acheive it? (I
know some php but I'm far from being an expert)

Thanks in advance

Alfonso Acosta

[Chris Hope]

Re: Getting EXIF data from external images (http URLs)

Alfonso Acosta wrote:

exif_read_data( ) doesn't support URLs
(http://php.net/manual/en/function.exif-read-data.php ) but I would
like to do that with the minimum traffic and overhead possible.
>
A naive solution would be downloading the whole target file locally
and then call exif_read_data( )

Sounds like exactly what you'd need to do.

but that means a lot of overhead
traffic considering I only want the exif header.
>
My approach would be getting just the header but

But you'd need to get the whole file to read the exif info, wouldn't
you, because the exif info is part of the file and not separate from
it.

1) Did anyone implement it already?
>
2) Is it possible? Any suggestions/advices about how to acheive it? (I
know some php but I'm far from being an expert)

What sort of exif information are you wanting to extract? Given that
images are generally optimised before being put online, most (if not
all) the exif data will have been removed as it's unnecessary for
display on a website and just adds overhead.

--
Chris Hope | www.electrictoolbox.com | www.linuxcdmall.com