How to Implement Simple PHP Pagination for Web Applications?

PHP Pagination: A Simple Script

Introduction

Managing data efficiently for web applications often involves implementing pagination to divide extensive data into manageable pages. This article provides a rudimentary script that enables pagination in PHP.

PHP Pagination Script

To avoid repeating the same code for separate pages, we utilize a combination of HTML and PHP. Here's the script:

<?php
try {
    // Count total database rows
    $total = $dbh->query('SELECT COUNT(*) FROM table')->fetchColumn();

    // Set pagination parameters
    $limit = 20;
    $pages = ceil($total / $limit);

    // Get current page number
    $page = filter_input(INPUT_GET, 'page', FILTER_VALIDATE_INT, ['options' => ['default' => 1, 'min_range' => 1]]);

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

    // Display pagination information
    $start = $offset + 1;
    $end = min(($offset + $limit), $total);
    $prevlink = ($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>';
    $nextlink = ($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>';

    // Prepare paged query
    $stmt = $dbh->prepare('
        SELECT * FROM table ORDER BY name LIMIT :limit OFFSET :offset
    ');
    $stmt->bindParam(':limit', $limit, PDO::PARAM_INT);
    $stmt->bindParam(':offset', $offset, PDO::PARAM_INT);
    $stmt->execute();

    // Display results
    if ($stmt->rowCount() > 0) {
        $stmt->setFetchMode(PDO::FETCH_ASSOC);
        $iterator = new IteratorIterator($stmt);
        foreach ($iterator as $row) {
            echo '<p>' . $row['name'] . '</p>';
        }
    } else {
        echo '<p>No results could be displayed.</p>';
    }
} catch (Exception $e) {
    echo '<p>' . $e->getMessage() . '</p>';
}
?>

Conclusion

This script employs HTML and PHP to dynamically display data over multiple pages, offering users a seamless and intuitive browsing experience.

The above is the detailed content of How to Implement Simple PHP Pagination for Web Applications?. For more information, please follow other related articles on the PHP Chinese website!