INSERT INTO carrello(session, user, prodotto, quantita, ip, data_aggiunta) VALUES ('d3b9766af0759cc067968bb5530fbc5b', , 207, 1, '54.81.71.187', 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 ' 207, 1, '54.81.71.187', NOW() ) ON DUPLICATE KEY UPDATE user=user' at line 1