INSERT INTO carrello(session, user, prodotto, quantita, ip, data_aggiunta) VALUES ('4c7f503a40cc59bcc2478540d93c8cb2', , 240, 1, '54.224.89.34', NOW() ) ON DUPLICATE KEY UPDATE user=user
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ' 240, 1, '54.224.89.34', NOW() ) ON DUPLICATE KEY UPDATE user=user' at line 1