Filtering ACF Content Blocks with WordPress Hooks & Filters

Here at WebDevStudios, we do quite a bit with Flexible Content Blocks in Advanced Custom Fields (ACF). If you aren’t familiar with the plugin, ACF allows for the creation of a multitude of custom meta field types using a graphical user interface (GUI) in the WordPress Dashboard. You can do almost anything with these fields—from simple text and URL inputs to searching for posts and pages and building image galleries. ACF allows you to power your site with robust customization options, which you can use to create and manage dynamic pages. Instead of being locked into a set of page templates where the functionality and layout are tied directly to the theme’s files, building pages with ACF Flexible Content Blocks puts the power of customization into your hands as a site manager and editor. You can add, remove, and rearrange blocks as needed and have full control over the content within each of those blocks.
Sometimes, though, simply customizing the content within those blocks isn’t enough. Sure, it’s nice enough to be able to edit the title of a block or select a different set of Featured Posts to display. But, what if you don’t want to have to get that
Source: https://managewp.org/articles/18158/filtering-acf-content-blocks-with-wordpress-hooks-filters

source https://williechiu40.wordpress.com/2018/11/30/filtering-acf-content-blocks-with-wordpress-hooks-filters/