WordPress at Your Fingertips
action is not described

block_editor_meta_box_hidden_fields action-hook . WP 5.0.0

Add hidden input fields to the meta box save form.

Hook into this action to print <input type="hidden" ... /> fields, which will be POSTed back to the server when meta boxes are saved.


add_action( 'block_editor_meta_box_hidden_fields', 'action_function_name_234' );
function action_function_name_234( $post ){
	// action...
The post that is being edited.

Where the hook is called

wp-admin/includes/post.php 2435
do_action( 'block_editor_meta_box_hidden_fields', $post );

Where in WP core the hook is used WordPress

Usage not found.