register_block_core_footnotes_post_meta

WordPress Version: 6.5

/**
 * Registers the footnotes meta field required for footnotes to work.
 *
 * @since 6.5.0
 */
function register_block_core_footnotes_post_meta()
{
    $post_types = get_post_types(array('show_in_rest' => true));
    foreach ($post_types as $post_type) {
        // Only register the meta field if the post type supports the editor, custom fields, and revisions.
        if (post_type_supports($post_type, 'editor') && post_type_supports($post_type, 'custom-fields') && post_type_supports($post_type, 'revisions')) {
            register_post_meta($post_type, 'footnotes', array('show_in_rest' => true, 'single' => true, 'type' => 'string', 'revisions_enabled' => true));
        }
    }
}