form-functions.php

<?php

/**
 * WPForms, Pass Entry ID on form completion
 * @author Bill Erickson
 * @see https://www.billerickson.net/code/wpforms-display-form-data-on-confirmation-page/
 */
function ea_form_id_in_redirect( $url, $form_id, $fields ) {
    if( $form_id != EA_CUSTOMER_FORM_ID )
        return;
    $entry_id = $_POST['wpforms']['entry_id'];
    return ea_url_with_entry( $url, $entry_id );
}
add_filter( 'wpforms_process_redirect_url', 'ea_form_id_in_redirect', 10, 3 );

/**
 * URL with Entry
 *
 */
function ea_url_with_entry( $url = false, $entry_id = false, $scheme = 'auth' ) {
    $url = add_query_arg(
        array(
            'entry_id'   => $entry_id,
            'entry_hash' => ea_entry_hash( $entry_id, $scheme ),
        ),
        esc_url( $url )
    );
    return $url;
}

/**
 * Entry Hash
 *
 */
function ea_entry_hash( $entry_id = false, $scheme = 'auth' ) {
    return sha1( 'entry' . $entry_id . wp_salt( $scheme ) );
}

/**
 * Verify Entry
 *
 */
function ea_verify_entry() {
    $return = array( 'type' => 'error', 'message' => 'Unknown Error' );
    $entry_id     = isset( $_GET['entry_id'] ) ? esc_attr( $_GET['entry_id'] ) : false;
    $entry_hash   = isset( $_GET['entry_hash'] ) ? esc_attr( $_GET['entry_hash'] ) : false;
    $verified_hash = array( ea_entry_hash( $entry_id ) );
    if( is_user_logged_in() )
        $verified_hash[] = ea_entry_hash( $entry_id, 'logged_in' );
    if( ! $entry_id ) {
        $return['message'] = 'No entry specified';
    } elseif( ! $entry_hash ) {
        $return['message'] = 'Security hash not provided';
    } elseif( !in_array( $entry_hash, $verified_hash ) ) {
        $return['message'] = 'Security hash incorrect';
    } else {
        $entry = wpforms()->entry->get( $entry_id );
        if( empty( $entry ) ) {
            $return['message'] = 'Entry cannot be found';
        } else {
            $return = array( 'type' => 'success', 'message' => 'Success', 'entry' => $entry );
        }
    }
    return $return;
}

view-estimate.php

<?php
/**
 * Template Name: View Your Estimate
 *
 * @package      EAStarter
 * @since        1.0.0
 * @copyright    Copyright (c) 2014, Contributors to EA Genesis Child project
 * @license      GPL-2.0+
 */



/**
 * Estimate Content
 * @author Bill Erickson
 * @see https://www.billerickson.net/code/wpforms-display-form-data-on-confirmation-page/
 */
function ea_estimate_content() {

    $verified_entry = ea_verify_entry();
    if( 'error' == $verified_entry['type'] ) {

        echo '<p class="error">Error: ' . $verified_entry['message'] . '</p><p>To receive an estimate, please complete <a href="' . home_url( 'schedule-a-cleaning-now' ) . '">this form</a>.</p>';

    } else {

        $entry = $verified_entry['entry'];
        $fields = json_decode( $entry->fields, true );
        
        // Display field data however you like. Ex:
        echo '<p><strong>Preferred Contact Method:</strong> ' . $fields[10]['value'] . '</p>';

    }
}
add_action( 'tha_entry_content_after', 'ea_estimate_content' );


// Build the page
require get_template_directory() . '/index.php';