<?php

                    $sql = "SELECT id_book, tytul, autor, wydawnictwo, ilosc, rok_wydania FROM books";
                    $result = $conn->query($sql);


                    echo '<select name="produkt">';

                    while($row = mysqli_fetch_assoc($result)) {

                        echo '<option value="' . $row['id_book'] . '">' . $row['tytul'] . '</option>';


                        echo '</select>';


                        echo '<form action="wypozycz2.php" method="post">';
                        echo '<input type="hidden" value="' . $row['id_book'] . '" name="id_book">';
                        echo '<input type="hidden" value="' . @$_POST['id_czytelnika'] . '" name="id_czytelnika">';
                        echo '<td class="alignCenter"><button type="submit"  class="buttonType1 loginSuccessful" value="">Wypożycz</td>';
                        echo '</form>';
                        }
                    ?>