Does Coppermine have the ability to allow posting images through a 3rd-party site? Like Flickr or Imgur?
Not out of the box. But if the 3rd-party site has some sort of api for image access, it could possibly be done with a plugin.
We used to have the facility pre cpg1.5, however that was dropped due to the flash uploader. It was quite a limited system but has been asked about quite a lot. There is a plugin available but I have never tested it. http://forum.coppermine-gallery.net/index.php/topic,78757.0.html
In the next few days I'll update that plugin for use with CPG1.6 (and PHP7) then post it in the CPG1.6 plugins area.
Thanks, just a little heads-up.
Gave it a try. And I don't know if this will help with the upgrade, but any code I insert I get an error message saying "Selected album does not exist or you don't have permission to upload in this album".
I also may be doing something wrong because it's all in German (I think). Hopefully you could translate for us ignorant ones.
Here you go. Ron4Mac has kindly ported the plugin for CPG 1.6.x - http://forum.coppermine-gallery.net/index.php/topic,79141.0.html