<?php namespace Activitypub\Integration; class Jetpack { public static function init() { \add_filter( 'jetpack_sync_post_meta_whitelist', [ __CLASS__, 'add_sync_meta' ] ); } public static function add_sync_meta( $whitelist ) { if ( ! is_array( $whitelist ) ) { return $whitelist; } $activitypub_meta_keys = [ 'activitypub_user_id', 'activitypub_inbox', 'activitypub_actor_json', ]; return \array_merge( $whitelist, $activitypub_meta_keys ); } }