update_noptin_subscriber( $subscriber_id,  $details = array() )

function update_noptin_subscriber( $subscriber_id, $details = array() ) {
	global $wpdb;
	$subscriber_id = absint( $subscriber_id );

	// Ensure the subscriber exists.
	$subscriber = get_noptin_subscriber( $subscriber_id );
	if ( ! $subscriber->exists() ) {
		return false;
	}

	// Prepare main variables.
	$table     = get_noptin_subscribers_table_name();
	$fields    = wp_unslash( $details );
	$to_update = array();

	// Maybe split name into first and last.
	if ( isset( $fields['name'] ) ) {
		$names = noptin_split_subscriber_name( $fields['name'] );

		$fields['first_name']  = empty( $fields['first_name'] ) ? $names[0] : trim( $fields['first_name'] );
		$fields['second_name'] = empty( $fields['second_name'] ) ? $names[1] : trim( $fields['second_name'] );
		unset( $fields['name'] );

	}

	if ( isset( $fields['last_name'] ) ) {
		$fields['second_name']  = empty( $fields['second_name'] ) ? trim( $fields['last_name'] ) : $fields['second_name'];
		unset( $fields['last_name'] );
	}

	if ( isset( $fields['id'] ) ) {
		unset( $fields['id'] );
	}

	foreach ( noptin_parse_list( 'email first_name second_name confirm_key date_created active confirmed' ) as $field ) {
		if ( isset( $fields[ $field ] ) ) {
			$to_update[ $field ] = noptin_clean( $fields[ $field ] );
			unset( $fields[ $field ] );
		}
	}

	if ( ! empty( $to_update ) ) {
		$wpdb->update( $table, $to_update, array( 'id' => $subscriber_id ) );
	}

	// Insert additional meta data.
	foreach ( $fields as $field => $value ) {

		if ( 'name' === $field || 'integration_data' === $field ) {
			continue;
		}

		update_noptin_subscriber_meta( $subscriber_id, $field, $value );
	}

	// Clean the cache.
	$old_subscriber = new Noptin_Subscriber( $subscriber_id );
	$old_subscriber->clear_cache();

	do_action( 'noptin_update_subscriber', $subscriber_id, $details );

	return true;

}