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php实现分页类

2026-02-27 17:47:00PHP

php实现分页类

PHP 分页类实现

分页功能在Web开发中非常常见，可以通过封装一个分页类来简化代码。以下是一个完整的PHP分页类实现方案：

分页类基本结构

class Pagination {
    private $totalItems;
    private $itemsPerPage;
    private $currentPage;
    private $totalPages;
    private $pageRange = 5;
    private $url;

    public function __construct($totalItems, $itemsPerPage, $currentPage, $url = '') {
        $this->totalItems = $totalItems;
        $this->itemsPerPage = $itemsPerPage;
        $this->currentPage = max(1, min($currentPage, $this->getTotalPages()));
        $this->url = $url;
    }

    public function getTotalPages() {
        return ceil($this->totalItems / $this->itemsPerPage);
    }
}

核心分页逻辑

public function getPaginationLinks() {
    $links = [];
    $totalPages = $this->getTotalPages();

    // 上一页
    if ($this->currentPage > 1) {
        $links[] = [
            'page' => $this->currentPage - 1,
            'text' => '上一页',
            'active' => false
        ];
    }

    // 页码链接
    $start = max(1, $this->currentPage - floor($this->pageRange / 2));
    $end = min($totalPages, $start + $this->pageRange - 1);

    for ($i = $start; $i <= $end; $i++) {
        $links[] = [
            'page' => $i,
            'text' => $i,
            'active' => ($i == $this->currentPage)
        ];
    }

    // 下一页
    if ($this->currentPage < $totalPages) {
        $links[] = [
            'page' => $this->currentPage + 1,
            'text' => '下一页',
            'active' => false
        ];
    }

    return $links;
}

URL生成方法

public function getPageUrl($page) {
    if (strpos($this->url, '?') !== false) {
        return $this->url . '&page=' . $page;
    } else {
        return $this->url . '?page=' . $page;
    }
}

数据库分页查询

public function getLimitOffset() {
    $offset = ($this->currentPage - 1) * $this->itemsPerPage;
    return [
        'limit' => $this->itemsPerPage,
        'offset' => $offset
    ];
}

完整使用示例

// 假设总记录数为100，每页显示10条，当前第3页
$totalItems = 100;
$itemsPerPage = 10;
$currentPage = isset($_GET['page']) ? (int)$_GET['page'] : 1;
$url = 'http://example.com/list.php';

$pagination = new Pagination($totalItems, $itemsPerPage, $currentPage, $url);
$links = $pagination->getPaginationLinks();

// 数据库查询
$limitData = $pagination->getLimitOffset();
$sql = "SELECT * FROM items LIMIT {$limitData['limit']} OFFSET {$limitData['offset']}";

// 显示分页链接
foreach ($links as $link) {
    $class = $link['active'] ? 'active' : '';
    echo "<a href='{$pagination->getPageUrl($link['page'])}' class='$class'>{$link['text']}</a> ";
}

样式优化建议

.pagination a {
    display: inline-block;
    padding: 5px 10px;
    margin: 0 2px;
    border: 1px solid #ddd;
    text-decoration: none;
}

.pagination a.active {
    background-color: #007bff;
    color: white;
    border-color: #007bff;
}

.pagination a:hover:not(.active) {
    background-color: #ddd;
}