Forum5,
Though your way is a valid way of doing it, it breaks the back button.
http://www.w3.org/QA/Tips/reback
with the PHP location setup.. you can still click back and go to the page you were previously viewing. With yours, it would go back to the page that refreshes.. and the user would be redirected to the store. Eventually they'll just get annoyed and leave.. you never know where the customer was previously at.. maybe they were at a page that said "you can buy this product here: yourstoreURL.com"
