Contador de itens que atualiza via AJAX

counter.php

<?php
// Ensure cart contents update when products are added to the cart via AJAX (place the following in functions.php)
add_filter( 'woocommerce_add_to_cart_fragments', 'woocommerce_header_add_to_cart_fragment' );
function woocommerce_header_add_to_cart_fragment( $fragments ) {
	ob_start();
	?>
	<a class="cart-contents" href="<?php echo wc_get_cart_url(); ?>" title="<?php _e( 'View your shopping cart' ); ?>"><?php echo sprintf (_n( '%d item', '%d items', WC()->cart->get_cart_contents_count() ), WC()->cart->get_cart_contents_count() ); ?> - <?php echo WC()->cart->get_cart_total(); ?></a> 
	<?php
	
	$fragments['a.cart-contents'] = ob_get_clean();
	
	return $fragments;
}