INSERT INTO carrello(session, user, prodotto, quantita, ip, data_aggiunta) VALUES ('6f14ba76be27d399403ca53985b6c818', , 228, 1, '54.224.103.239', 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 ' 228, 1, '54.224.103.239', NOW() ) ON DUPLICATE KEY UPDATE user=user' at line 1