Magento remove items from cart at loggin out -

i want clear or remove items cart after logout user. found don't know have put exactly

foreach( mage::getsingleton('checkout/session')->getquote()->getitemscollection() $item ){  mage::getsingleton('checkout/cart')->removeitem( $item->getid() )->save(); } 

you need create observer "customer_logout" event.

answer here describe how create observer

you need use "customer_logout" instead of "catalog_product_save_before".