The solution I finally programmed myself is so easy and simple that I really wonder why these 5 lines of code are not already integrated in Folgerblog...

ikue

can you post/share the 5 lines to get this working?

thanks

richard

I would also like to see this...

Of course I can :)

function cmpexiftime($a, $b) {
$exif1 = exif_read_data($a, 0, true);
$exif2 = exif_read_data($b, 0, true);

if ($exif1["EXIF"]["DateTimeOriginal"]==$exif2["EXIF"]["DateTimeOriginal"]) {
return 0;
}
return $exif1["EXIF"]["DateTimeOriginal"] < $exif2["EXIF"]["DateTimeOriginal"] ? -1 : 1;
}

You simply have to include these lines in fb.php, and replace the existing line

uksort($files,"cmpmtime");

by

uksort($files,"cmpexiftime");

That´s it... ikue

ikue,

Tried the code you provided but got about a dozen error messages like this:

Notice: Undefined index: DateTimeOriginal in /mnt/web_g/d03/s49/b021eca5/www/folderblog/fb.php on line 176

Notice: Undefined index: DateTimeOriginal in /mnt/web_g/d03/s49/b021eca5/www/folderblog/fb.php on line 179

Notice: Undefined index: DateTimeOriginal in /mnt/web_g/d03/s49/b021eca5/www/folderblog/fb.php on line 176

Notice: Undefined index: DateTimeOriginal in /mnt/web_g/d03/s49/b021eca5/www/folderblog/fb.php on line 179

http://www.frhendrix.com/folderblog/fb.php

Any idea what I did wrong?

thanks

richard

Hmm... sounds like a problem with the variables. Just in advance, does the EXIF-function work in general on your server? So, if you include the EXIF extension, can you read out the additional image information?

I use folderblog 3, last beta

I'm using FB 3.16b, the last beta. EXIF displays correctly as is... See it here http://www.frhendrix.com/folderblog/fb.php I have it set up in a test folder before I move it to my normal server area. I have noticed that it does not show ISO but I think that is a Canon camera thing...

thanks

richard

The code you posted works great, ikue. Thanks.

But would somebody help me reverse the order? I would like to have the newest photo last, so that you get a slide show in chronological order.

Sorry I don't have the slightest idea of programming, but I hope this can be done with a single variable or something.

Thank you

Gernot, try changing in line

return $exif1["EXIF"]["DateTimeOriginal"] < $exif2["EXIF"]["DateTimeOriginal"] ? -1 : 1;

the "<" into ">". Tell me if I am wrong, as it is late in Barcelona city. ;)

Richard, have you changed anything in the folderblog 3 files? As it works with Gernot, it should also be working with you. Maybe you try a "reinstallation" of my lines. Check if you followed the instructions. What I wondered about, are you sure you read out EXIF on your website? it looks more like the information is already put in the image, and not dynamically extracted from JPEG.

The hack work cool!

I propose we include it in the next beta of folderblog... a nasty little extra feature, he? ;)

ikue,

I compared my fb.php with a fresh fb.php and both are the same except I added code to make the gravatar hack work. I am using the almanac template (3.16) for Folderblog.

EXIF is showing up in my information area for each photo. So I guess it is compiled into the sever software.

In your fb_settings.php file what setting are you using for $sort=0 ? I sort by file modified date.

Thanks for helping,

richard

Also, yes I have reinstalled your code and still no joy... I will try again.

Is there a way to convert this code to an extension?

richard

Thanks very much, ikue! It works perfectly.

I agree that this should be integrated into folderblog.

Richard, I also have $sort = 0, so this can't be it. And no, there is in my opinion no way to convert this into an extension as it requires changes deep inside the fb.php. Suggestion: Mail me your fb.php, maybe I can have a quick look at it. Write to bjoern (dummy text, here has to be the "at") ikue.de

The problem is fairly obvious. You have at least some files with no exif data (or at least not a date). So obviously the index will be invalid. I'm having the same problem. Solution to follow. :)

Well, the problem was fairly simple. Just a matter of checking if exif_read_data actually produces exif data, and if the exif data we are interested in is in the array. Really this should've been done in the first place. ;) Seems to work well now. Enjoy!

Replace the above function definition with these two functions.

function exifdate($file) {
$exif = exif_read_data($file, 0, true);
if (array_key_exists("EXIF", $exif)) {
if (array_key_exists("DateTimeOriginal", $exif["EXIF"])) {
return $exif["EXIF"]["DateTimeOriginal"];
}
}
return date ("Y:m:d H:i:s", filemtime($file)) ;
}

function cmpexiftime($a, $b) {
$date1 = exifdate($a);
$date2 = exifdate($b);
if ( $date1 == $date2 ) {
return 0;
}
return $date1 < $date2 ? -1 : 1;
}

Now heres one to add to this code: Can anyone write the EXIF date into the normal date box that appears in /post/?

Hello Sean, not much of a problem.... look out in fb.php for the line

filemtime($fbimage[1])+$time_difference)

(it appears twice, go to the first one).

Now you have two substitute the part of

filemtime($fbimage[1])

by

$exif["EXIF"]["DateTimeOriginal"]

as mentioned above by Enki. What is left is to include one line BEFORE the $fbpostform = xxxxxxxxxx the line

$exif = exif_read_data($fbimage[1], 0, true);

to read out the necessary information. Any questions? ;)

PS: Of course the code might not work directly from the start as I didnt test it! But the idea is clear.

Hummm i've got a problem wint fb_exif.php extension, this extension said that i use alerady the flash but it's wrong ! It's a problem because this information is not true :-((( What can i do please ? Help me !!!! HHEELLPP MMEE !!! ;-)

Got me on that. Thanks for the solution provided above. It saved me some hours of trial and error.

I compared my fb.php with a fresh fb.php and both are the same except I added code to make the gravatar hack work. I am using the almanac template (3.16) for Folderblog. Thanks anyway for the solutions.