【PHP开发】深入浅出理解PHP分页原理与面向对象封装模块功能实现《附完整版代码》

<?php
class Pagination {
    private $current_page;
    private $per_page_record;
    private $total_records;
    private $total_pages;
    private $url;
 
    function __construct($total_records, $current_page, $url, $per_page_record = 10) {
        $this->total_records = $total_records;
        $this->current_page = $current_page;
        $this->url = $url;
        $this->per_page_record = $per_page_record;
 
        $this->total_pages = ceil($total_records / $per_page_record);
    }
 
    function createLinks() {
        $html = '';
 
        if ($this->current_page > 1) {
            $previous = $this->current_page - 1;
            $html .= "<a href='{$this->url}page={$previous}'>Previous</a>";
        }
 
        for ($x = max(1, $this->current_page - 2); $x <= min($this->total_pages, $this->current_page + 2); $x++) {
            if ($x == $this->current_page) {
                $html .= "{$x}";
            } else {
                $html .= "<a href='{$this->url}page={$x}'>{$x}</a>";
            }
        }
 
        if ($this->current_page < $this->total_pages) {
            $next = $this->current_page + 1;
            $html .= "<a href='{$this->url}page={$next}'>Next</a>";
        }
 
        return $html;
    }
}
 
// 使用示例
$total_records = 100; // 假设总共有100条记录
$current_page = isset($_GET['page']) ? (int)$_GET['page'] : 1;
$url = 'http://example.com/page='; // 分页链接的基础URL
 
$pagination = new Pagination($total_records, $current_page, $url);
echo $pagination->createLinks();

这段代码实现了一个简单的分页类，可以用来生成分页导航链接。类中定义了构造函数、属性和方法，方法中包含了计算总页数、创建分页链接的逻辑。使用时，只需实例化该类，并调用createLinks方法即可生成分页导航。