Hi extensions creators,
Piwigo 2.4.0 is not very far. Of course, a Piwigo with no extension does not show its full power! This is why we have prepared a documentation to make your extensions compatible with this new version.
Piwigo 2.4 introduces big changes, with the new derivatives (multiple size).
[wiki] Technical changes in Piwigo 2.4
If you find any missing information, please add it in the wiki page and notify it in this topic. If you need any help or if you think you won't have enough available time to upgrade your extension, tell us and we'll see if someone else can do it.