/**
* Adds and displays the "Product metadata" meta box.
*
* @see https://wpcodebook.com/woocommerce-product-metadata-meta-box/
* @see https://developer.wordpress.org/reference/hooks/add_meta_boxes/
* @see https://developer.wordpress.org/reference/functions/add_meta_box/
* @see https://developer.wordpress.org/reference/functions/get_post_meta/
*/
add_action( 'add_meta_boxes', function ( $post_type, $post ) {
add_meta_box(
'wpcodebook-product-metadata-meta-box',
esc_html__( 'Product metadata' ),
function ( $post ) {
echo '<pre>' .
print_r( get_post_meta( $post->ID ), true ) .
'</pre>';
},
'product'
);
}, 10, 2 );