custom-fields | active development | Machine Learning library

Ive set up an ACF with 2 checkboxes, which are shown up in the product admin:

on the product frontend only the selected values form the backend are chooseable:

Ive the following code im my funtions:

I recently updated my site to php 7.4. It's running a custom build wordpress theme using ACF Pro v 5.5.5. However, once updated i get this error:

I am building a website using Advanced Custom Fields that has yachts for sale. The yachts use a custom Post type called ‘yachts’

One of the fields in the individual yacht listing is a true/false value to determine wether it should be a featured listing. (it was originally a checkbox but I changed it after experimenting with the answer in this post)

Advanced custom fields: can't query posts by custom field

I am trying to display previews of the featured listings on the home page but I can’t get it to work.

I originally tried this code from the ACF documentation

edit: I started with just trying to fetch the title but I also need the additional fields

Based on Show custom fields on the order editing page in WooCommerce answer code where I did some slight changes:

In WooCommerce, I have added a checkbox in single product pages and also on the products loops, where the user can check that they want to request a certificate.

My code below works fine on single product pages. However, in the products loops, the value of the check box is always taken, even if the checkbox is unchecked. It should only be taken if the checkbox is checked.

Here is my code:

Based on Enhanced WooCommerce Custom Fields for Variations answer code for adding a custom field to a product variation which works.

I have added additional custom fields, 6 at all. When I update the product, the data does not save and does not display on the front end either.

What have I done incorrectly when adding the additional custom fields?

My code:

I am trying to create a shortcode that will display one post (selected by the user). I have a function that works for regular posts but it doesn't display anything for my custom post types (or pages for that matter) and I am not quite sure why.

The shortcode:

Using the Remi Coulson tutorial, a custom field has been added for product variations.

This works, however the custom field is positioned by the add-to-cart button. I wish to position it within Additional Information tab. I have tried adding the front end code to the additional-information.php but it does not display.

I have created a custom post type called institute. Here is the code for custom post type creation.