Question

我想对搜索条目的结果进行分页。

我已经尝试了一些对数据进行分页但却无法进行搜索的代码。

在第一页上，它很好。它显示了前20个结果，并且具有正确的分页和总结果。但无论何时我点击下一个或前进，它都会显示＆＃34;无法显示任何结果＆＃34;这意味着输入的条目丢失了。

请帮忙。谢谢！

这是我的代码：

<?php
require("config.inc.php");//databaseconnection
$entry = $_POST['entry'];
    // Find out how many items are in the table
    $total = $dbconn->query('
        SELECT
            COUNT(*)
        FROM
            'mytable'
        WHERE
            'column' = $entry
    ')->fetchColumn();

    // How many items to list per page
    $limit = 20;

    // How many pages will there be
    $pages = ceil($total / $limit);

    // What page are we currently on?
    $page = min($pages, filter_input(INPUT_GET, 'page', FILTER_VALIDATE_INT, array(
        'options' => array(
            'default'   => 1,
            'min_range' => 1,
        ),
    )));

    // Calculate the offset for the query
    $offset = ($page - 1)  * $limit;

    // Some information to display to the user
    $start = $offset + 1;
    $end = min(($offset + $limit), $total);

    // The "back" link
    $prevlink = ($page > 1) ? '<a href="?page=1" title="First page">&laquo;</a> <a href="?page=' . ($page - 1) . '" title="Previous page">&lsaquo;</a>' : '<span class="disabled">&laquo;</span> <span class="disabled">&lsaquo;</span>';

    // The "forward" link
    $nextlink = ($page < $pages) ? '<a href="?page=' . ($page + 1) . '" title="Next page">&rsaquo;</a> <a href="?page=' . $pages . '" title="Last page">&raquo;</a>' : '<span class="disabled">&rsaquo;</span> <span class="disabled">&raquo;</span>';

    // Display the paging information
    echo '<div id="paging"><p>', $prevlink, ' Page ', $page, ' of ', $pages, ' pages, displaying ', $start, '-', $end, ' of ', $total, ' results ', $nextlink, ' </p></div>';

    // Prepare the paged query
    $stmt = $dbconn->prepare('
        SELECT
            *
        FROM
            'mytable'
        WHERE
            'column' = $entry
        LIMIT
            :limit
        OFFSET
            :offset
    ');

    // Bind the query params
    $stmt->bindParam(':limit', $limit, PDO::PARAM_INT);
    $stmt->bindParam(':offset', $offset, PDO::PARAM_INT);
    $stmt->execute();

    // Do we have any results?
    if ($stmt->rowCount() > 0) {
        // Define how we want to fetch the results
        $stmt->setFetchMode(PDO::FETCH_ASSOC);
        $iterator = new IteratorIterator($stmt);

        // Display the results
        foreach ($iterator as $row) {
            echo $row['ID'] . ", " . $row['name'] . "<br>";
        }

    } else {
        echo '<p>No results could be displayed.</p>';
    }

?>

Answer 1

点击链接后，"Hello world!".UnicodeSafeSubstring(0, 6) == "Hello"将为空，因为没有发出POST请求，因此$entry为空（链接点击使用GET方法）。您需要将此更改为使用GET或使用表单与$entry = $_POST['entry'];进行分页。

使用PHP和PDO搜索分页

1 个答案: