Select Statement Structure (Named Params)

               // Named params
               $uname = $_POST['username'];
               $sql = "SELECT * FROM users WHERE username = :username LIMIT 1";
               $stmt = $pdo->prepare($sql);
               $stmt->bindParam('username', $uname);
               $stmt->execute();

               while ($row = $stmt->fetch(PDO::FETCH_ASSOC)){

                    $id = htmlentities($row['id']);
                    $username = htmlentities($row['username']);

               }//While loop close