Get current cart nb product

Hi.

I try to get the current number of products in cart calling the blockcart module, without success.

I call the prestashop like this in WP
<?php ps_include('./modules/blockcart/blockcart.tpl'); ?>

And i call this module like this in Prestashop
{include file='./modules/blockcart/blockcart.tpl'}

When i add some product to the cart, this work well in Prestashop side, but the cart is not updated in WP side…can you please help me ?

thank you