imath

<?php

// Registers a REST field for the Activity Endpoints.
function example_register_activity_rest_field() {
	bp_rest_register_field(
		'activity',      // Id of the BuddyPress component the REST field is about
		'example_field', // Used into the REST response/request
		array(
			'get_callback'    => 'example_get_rest_field_callback',    // The function to use to get the value of the REST Field
			'update_callback' => 'example_update_rest_field_callback', // The function to use to update the value of the REST Field

imath

<?php
/**
 * Plugin Name: BP Example Block
 * Plugin URI:  https://buddypress.org/
 * Description: Example of BuddyPress block.
 * Author:      The BuddyPress Community
 * Author URI:  https://buddypress.org/
 * Version:     1.0.0
 * Text Domain: buddypress
 * Domain Path: /languages/