WooCommerce Product Attributes - Dump them in a metabox for debugging

wp-plugin-woo-product-attributes-debug.php

<?php
/**
 * Plugin Name: Product Attributes - Debug 
 * Description: Dump the product attributes in a metabox.
 * Author:      birgire
 * Author URI:  Https://github.com/birgire
 * Version:     0.0.1
 */

// PHP 5.3.3+

/**
 * Metabox to display debug info on product attributes
 */

add_action( 'add_meta_boxes', 
	function(){
		add_meta_box(
			'birgire_debug',
			'Product Attributes - Debug',
			'birgire_meta_box_callback',
			'product'
		);
	}
);


/**
 * Metabox callback
 */
 
function birgire_meta_box_callback( $post )
{
	$product_attributes = (array) get_post_meta( $post->ID,  '_product_attributes' );
	printf( '<pre>%s</pre>', 
		print_r( $product_attributes, 1 ) 
	);
}