title: Why Prestashop doesn't use $_SESSION for session storage?
body: <p>I noticed that Prestashop 1.5 doesn't use $_SESSION(I'm not sure whether other versions take same approach) anywhere in its core to store session data.</p>
  
  <p>I'm really curious to find out why Prestashop developers decided against $_SESSION, and what was the design concerns that lead to this decision. Does it give considerable improvement in security or performance?</p>