setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); $query = $db->prepare("REPLACE INTO responses(q,v,a) VALUES(:qq, :qv, :qa)"); try { $query->execute(array(':qq' => $qq, ':qv' => $qv, ':qa' => $qa)); } catch(PDOException $e) { die($e->getMessage()); } print "OK"; ?>