@Edent But then I'd have to create a gitlab account and, worse, write PHP.

@Edent Some bizarre code in there.

in_array( $inbox_message["actor"], $followers_ids ) ? $from_follower = true: $from_follower = false;

Removing the duplicated code, this is just

$from_follower = in_array( $inbox_message["actor"], $followers_ids ) ? true : false;

And ... ? true : false is redundant, leaving:

$from_follower = in_array( $inbox_message["actor"], $followers_ids );

Is there a good introduction to the ActiviityPub protocol, particularly the stuff used by Mastodon? Like, if I wanted to write my own Mastodon-like software from scratch, what should I read to get started?

#ActivityPub #Fediverse