Register ACF Fields in Code
A ready-to-edit example that registers an ACF field group (subtitle, summary and call-to-action link) for posts in PHP, so the fields are version-controlled and cannot be changed in the admin.
Snippet Library
Custom Post Types & Fields snippets for WordPress
Snippets for custom post types, taxonomies and custom fields: register a post type, add meta boxes, show fields in lists and archives. For developers modeling content beyond posts and pages.