How to add EXIF support

[JMG]

Hi!

I was missing EXIF support in Comoblog (more specific the ability to view which date the picture was taken) and because of that i added it to my own installation of Comoblog. Maybe you should do something similar in the official build. I use a free PHP class (http://www.phpclasses.org/browse/package/1042.html) that does most of the work. I only had to add some line of code to post_add.php and comoblog_batch.php. First of all you have to include exifReader.inc then you have to add this in both post_add.php and comoblog_batch.php:

======
if ($post['images_extension'][$i] == 'jpg') {
   if (!isset($er)) {
      $er = new phpExifReader($post['images_tmp'][$i]);
   } else {
      $er->assign($post['images_tmp'][$i]);
   }
   $er->processFile();
   unset($exifdata);
   $exifdata = $er->getImageInfo();
   $imagedate = $exifdata['DateTime'];
   if (preg_match("/([0-9][0-9][0-9][0-9]):([0-9][0-9]):([0-9][0-9]) ([0-9][0-9]):([0-9][0-9]):([0-9][0-9])/", $imagedate) && strlen($imagedate) <= 20 ) {
        $imagedate[4] = "-";
        $imagedate[7] = "-";
      }
      else {
        $imagedate = "0000-00-00 00:00:00";
      }

} else $imagedate = "0000-00-00 00:00:00";

You have to change it a little to work in post_add.php (change from the $post variable to the $image variable). Then you have to change the mysql query so that the date is saved. In the sql database you have to add a column in the image table. Add a CHAR(20) which will store the date. Some small changes in the template is req to show the date. That’s all.

Bye

[JMG]

In comoblog_batch.php you should add this code just before the mysql query at line 137 (or something). In the post_add.php you should add it before the mysql query at line 108 (roughly).

/JMG

[Mark Wallis (aka serialmonkey)]

Thanks for this. I would probably prefer to add this as a Module rather than actual core code. Can't see any problems with handling it like that from first glance.

I've raised a RFE for it to be looked at.

https://sourceforge.net/tracker/index.php?func=detail&aid=1517303&group_id=143354&atid=755240

[JMG]

I've noticed some problems with the assign method so  its better not to use it. The code should therefor look like this:

            unset($exifdata);
            unset($imagedate);
            unset($er);
            if ($post['images_extension'][$i] == 'jpg') {
               $er = new phpExifReader($post['images_tmp'][$i]);
               $er->processFile();
               $exifdata = $er->getImageInfo();
               $imagedate = $exifdata['DateTime'];
               if (preg_match("/([0-9][0-9][0-9][0-9]):([0-9][0-9]):([0-9][0-9]) ([0-9][0-9]):([0-9][0-9]):([0-9][0-9])/", $imagedate) && strlen($imagedate) <= 20 ) {
                   $imagedate[4] = "-";
                   $imagedate[7] = "-";
              }
              else {
                   $imagedate = "0000-00-00 00:00:00";
              }

            } else $imagedate = "0000-00-00 00:00:00";