postmeta_form_keys WordPress Filter Hook

The postmeta_form_keys hook is a great way to add custom fields to your WordPress posts. This hook allows you to add new form fields to the post editing screen, which can be used to add extra data to your posts. You can use this hook to add text fields, checkboxes, select boxes, and more. This hook is perfect for adding custom fields to your posts, and can be used to add any type of data to your posts.

apply_filters( 'postmeta_form_keys', array|null $keys, WP_Post $post ) #