“下一步”按钮不会刷新下一个25个结果的页面

Question

I have the code below and am trying to get the next 25 results from my sql table to appear on page. However, whenever I click the next button, no information is displayed. I have my offset = ($page - 1) * $items_per_page......I'm struggling to figure this out as it seems so simple compared the other code I've written, but is proving to be very elusive to me....any assistance would be greatly appreciated. My primary issue is that the next link does not provide the next 25 results and I'm unable to determine why and how to correct.

                            echo "<h3 style='text-align:center;'>Welcome to the Exchange Portal,&nbsp;" . $row['name'] . "!&nbsp;</h3>";


                            $items_per_page = 25;


                            $sql_count = "SELECT pin, title, title2, email, phone FROM crown_acura";
                            $result_cnt = mysqli_query($conn, $sql_count);

                            if(false === $result_cnt) {
                                throw new Exception('Query failed with: ' . mysqli_error());
                                } else {
                                   $row_count = mysqli_num_rows($result_cnt);
                                   // free the result set as you don't need it anymore
                                   //mysqli_free_result($result_cnt);
                                }

                                echo $row_count;
                                echo "&nbsp;";

                                if (!isset($_GET['Page'])) {
                                    $Page = 1;
                                } else {
                                    $Page = $_GET['Page'];
                                }
                                echo $page;
                                echo "&nbsp;";

                                $page_count = 0;
                                if (0 === $row_count) {  
                                    // maybe show some error since there is nothing in your table
                                } else {
                                  // determine page_count
                                   $page_count = (int)ceil($row_count / $items_per_page);
                                   // double check that request page is in range
                                   if($page > $page_count) {
                                        // error to user, maybe set page to 1
                                        $page = 1;
                                   }
                                }
                                echo "&nbsp;";
                                echo $page_count;
                                echo "&nbsp;";
                                echo $items_per_page;

                                $offset = ($page-1)*$items_per_page;


                                //echo $paging_info;
                                //echo "&nbsp;";
                                echo "<br />";

                            //Query for displaying results
                            $list_sql = "SELECT pin, title, title2, email, phone FROM crown_acura LIMIT $offset, $items_per_page";
                            $result_query = $conn->query($list_sql);

                                //Table for displaying query results
                                echo "<table class='verify'>";
                                echo "<tr >";
                                echo "<td><h3>Name</h3></td><td>&nbsp;</td><td><h3>E-mail</h3></td><td><h3>Phone</h3></td>";
                                echo "</tr>";
                                for($i = 1; $i<= $page_count; $i++) {
                                    if ($result_query->num_rows > 0) {
                                        // output data of each row
                                        while($row3 = mysqli_fetch_array($result_query)) {
                                            echo "<tr>";
                                            echo "<td class='dltd2 dlcl'>" . $row3["title"] . "</td><td>" . $row3["title2"] . "</td><td><a href='mailto:" . $row3['email'] . "'>" . $row3["email"] . "</a>&nbsp;</td><td>" . $row3["phone"] . "&nbsp;</td>";
                                            echo "</tr>";   
                                        }
                                    } else {
                                        echo "0 results";   
                                    }
                                }
                                echo "<tr></tr>";


                                $next_page = $page + 1;
                                $last_page = $page - 1;

                                if($paging_info['curr_page'] <= 1) {
                                    echo "<tr>";
                                    echo "<td></td><td colspan='2'><a class='loadlink' href='" . $_PHP_SELF . "'>Next 25</a></td><td></td>";
                                    echo "</tr>";
                                } elseif ($paging_info['curr_page'] < $page_count) {
                                        echo "<tr>";
                                        echo "<td></td><td><a href='" . $_PHP_SELF . "?page=" . $last_page . "'>Prev 25</a></td><td><a href='" . $_PHP_SELF . "?page=" . $next_page . "'>Next 25</a></td><td></td>";
                                        echo "</tr>";
                                        } elseif ($paging_info['curr_page'] === $page_count) {
                                            echo "<tr>";
                                            echo "<td></td><td colspan='2'><a href='" . $_PHP_SELF . "?page=" . $last_page . "'>Prev 25</a></td><td></td>";
                                            echo "</tr>";
                                            }

                                echo "</table>";
                    }
                }
            }

Answer 1

Have you tried to run the rendered SQL.

Output to browser:

"SELECT pin, title, title2, email, phone FROM crown_acura LIMIT $offset, $items_per_page"