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.
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Save ACF Field Groups as JSON Outside the Theme
Stores Advanced Custom Fields field groups, post types and options pages as JSON files in wp-content/acf-json, so they survive theme changes and can go into version control.