pmpromc_subscribe

/**
 * Subscribe a user to a specific list
 *
 * @param $list - the List ID
 * @param $user - The WP_User object for the user
 */
function pmpromc_subscribe($list, $user)
{
    //make sure user has an email address
    if (empty($user->user_email))
        return;

    $options = get_option("pmpromc_options");
    $api = pmpromc_getAPI();
    $merge_fields = apply_filters("pmpro_mailchimp_listsubscribe_fields", array("FNAME" => $user->first_name, "LNAME" => $user->last_name), $user);

    $user_lists = get_user_meta( $user->id, 'pmpromc_additional_lists', true );
    if ( empty( $user_lists ) || ! is_array( $user_lists ) ) {
        $user_lists = array();
    }
    $user_lists[] = $list;
    update_user_meta( $user->id, 'pmpromc_additional_lists', $user_lists );
    $api->subscribe($list, $user, $merge_fields, "html", $options['double_opt_in']);
}