php面向对象写分页

<?php
class Paginator {
    private $totalItems;
    private $itemsPerPage;
    private $currentPage;

    public function __construct($totalItems, $itemsPerPage, $currentPage = 1) {
        $this->totalItems = $totalItems;
        $this->itemsPerPage = $itemsPerPage;
        $this->currentPage = $currentPage;
    }

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

    public function getCurrentPage() {
        return $this->currentPage;
    }

    public function getOffset() {
        return ($this->currentPage - 1) * $this->itemsPerPage;
    }

    public function getLimit() {
        return $this->itemsPerPage;
    }
}

// 示例使用
$totalItems = 100; // 总数据条数
$itemsPerPage = 10; // 每页显示的数据条数
$currentPage = isset($_GET['page']) ? intval($_GET['page']) : 1; // 当前页码

$paginator = new Paginator($totalItems, $itemsPerPage, $currentPage);

echo "Total Pages: " . $paginator->getTotalPages() . "\n";
echo "Current Page: " . $paginator->getCurrentPage() . "\n";
echo "Offset: " . $paginator->getOffset() . "\n";
echo "Limit: " . $paginator->getLimit() . "\n";

// 假设我们有一个数据库查询
$sql = "SELECT * FROM items LIMIT " . $paginator->getOffset() . ", " . $paginator->getLimit();
// 执行查询并显示结果
?>