Resumen de variables globales de prestashop
{$product->id_category_default|escape:'htmlall':'UTF-8'} Default Category ID
01 $base_dir { root folder of your shop }
02 $base_dir_ssl { root folder of your shop using HTTPS protocol }
03 $content_dir { root folder of your shop depending on the SSL settings }
04 $img_ps_dir { root folder containing images "/img/" }
05 $img_dir { images folder in your current theme directory }
06 $css_dir { css folder inside the current theme folder }
07 $js_dir { JavaScript inside the theme folder }
08 $tpl_dir { theme root folder }
09 $modules_dir { modules root folder }
10 $mail_dir { mail templates root folder }
11 $lang_iso { current language ISO code }
12 $come_from { previous page address [absolute] }
13 $shop_name { your specified shop name }
14 $cart_qties { total number of products in the cart }
15 $cart { shopping cart contents }
16 $currencies { pulls available currencies }
17 $id_currency_cookie { selected currency id [cookie dependent] }
18 $currency { active currency }
19 $cookie { active cookie }
20 $languages { grabs available languages }
21 $logged { checks whether users is logged in }
22 $page_name { current pages name }
23 $customerName { customer name [session dependent] }
24 $priceDisplay { current price display settings [currency dependent] } // 
