Returns to product category page after click on Continue Shopping button

functions.php

<?php

/**
* It takes the first category find on the array.
* Ideally for stores with products with a single category.
*/

add_filter( 'woocommerce_continue_shopping_redirect', 'wa_custom_redirect_continue_shopping' );
function wa_custom_redirect_continue_shopping() {
	global $woocommerce;
	$items = $woocommerce->cart->get_cart();
	$ids = array();
	foreach($items as $item => $values) { 
	        $_product = $values['data']->post; 
	        $ids[] = $_product->ID; 
	} 
	$last_item = end($ids);
	$terms = get_the_terms( $last_item, 'product_cat' );
	return get_term_link( $terms[0]->term_id, 'product_cat' );
}