Forminator - add redirector

<?php

add_action( 'plugins_loaded', 'wpmudev_forminator_add_redirect_url_to_hidden_field_func', 100 );

function wpmudev_forminator_add_redirect_url_to_hidden_field_func() {
    if ( defined('FORMINATOR_PRO') && class_exists( 'Forminator' ) ) {
        class wpmudev_forminator_add_redirect_url_to_hidden_field_func{
            private $form_id = 6;//enter form_id here
            private $redirect_url;

            public function __construct() {
                add_filter( 'forminator_form_submit_response', array( $this, 'get_redirect_url_form_submission' ), 20, 2 );
                add_filter( 'forminator_form_ajax_submit_response', array( $this, 'get_redirect_url_form_submission'), 20, 2 );
                add_action( 'forminator_form_after_handle_submit', array( $this, 'add_redirect_url_to_hidden_field'), 10, 2);
                add_action( 'forminator_form_after_save_entry', array( $this, 'add_redirect_url_to_hidden_field'), 10, 2);
            }

            public function get_redirect_url_form_submission( $response, $form_id ) {
                if ( $this->form_id == $form_id ) {
                    if ( ! empty( $response['url'] ) ) {
                        $this->redirect_url = $response['url'];
                    }
                }

                return $response;
            }

            public function add_redirect_url_to_hidden_field( $form_id, $response ) {
                if ( $this->form_id == $form_id ) {
                    $entry_meta = array(
                        array(
                        'name' => 'hidden-1',
                        'value' => $this->redirect_url
                        )
                    );
                    $entries = Forminator_API::get_entries( $form_id );
                    Forminator_API::update_form_entry( $form_id, $entries[0]->entry_id, $entry_meta );
                }
            }

        }

        $run = new wpmudev_forminator_add_redirect_url_to_hidden_field_func;
    }
}