WooCommerce - Sold Out Shortcode

functions.php

<?php

add_shortcode('soldoutproducts', 'custom_woocommerce_soldout_products');

/**
 * Recent Products shortcode with custom styles
 **/
function custom_woocommerce_soldout_products( $atts ) {
	
	global $woocommerce_loop;
	
	extract(shortcode_atts(array(
		'per_page' 	=> '9999',
		'columns' 	=> '4',
		'orderby' 	=> 'date',
		'order' 	=> 'desc'
	), $atts));
	
	$args = array(
		'post_type'				=> 'product',
		'post_status' 			=> 'publish',
		'ignore_sticky_posts'	=> 1,
		'posts_per_page' 		=> $per_page,
		'orderby' 				=> $orderby,
		'order' 				=> $order,
		'tax_query' 			=> array(
										array(
											'taxonomy' 	=> 'product_cat',
											'field' 	=> 'slug',
											'terms' 	=> 'sold-out'
										)
									)
	);
	
	ob_start();

	$products = new WP_Query( $args );
	
	$woocommerce_loop['columns'] = $columns;

	if ( $products->have_posts() ) : ?>
		
		<ul class="products">
			
			<?php while ( $products->have_posts() ) : $products->the_post(); ?>
		
				<?php woocommerce_get_template_part( 'content', 'product' ); ?>
	
			<?php endwhile; // end of the loop. ?>
				
		</ul>
		
	<?php endif; 

	wp_reset_query();
	
	return ob_get_clean();
}