_wp_rest_api_autosave_meta

WordPress Version: 3.1

/**
 * The REST API autosave endpoint doesn't save meta, so we can use the
 * `wp_creating_autosave` when it updates an exiting autosave, and
 * `_wp_put_post_revision` when it creates a new autosave.
 *
 * @since 6.3.0
 *
 * @param int|array $autosave The autosave ID or array.
 */
function _wp_rest_api_autosave_meta($autosave)
{
    // Ensure it's a REST API request.
    if (!defined('REST_REQUEST') || !REST_REQUEST) {
        return;
    }
    $body = rest_get_server()->get_raw_data();
    $body = json_decode($body, true);
    if (!isset($body['meta']['footnotes'])) {
        return;
    }
    // `wp_creating_autosave` passes the array,
    // `_wp_put_post_revision` passes the ID.
    $id = is_int($autosave) ? $autosave : $autosave['ID'];
    if (!$id) {
        return;
    }
    update_post_meta($id, 'footnotes', wp_slash($body['meta']['footnotes']));
}