php简单的分页类

一款简单实用的原生PHP分页类

<?php

/**
 * 简单分页类
 */
class PageClass {
    private $total; //总记录数
    private $pagesize; //每页显示多少条
    private $limit; //每页显示条数
    private $url;   //自定义url
    private $page;  //当前页码
    private $pagenum; //总页码

    //构造方法
    public function __construct($count, $size) {
        $this->total    = $count ? $count : 1;
        $this->pagesize = $size;
        $this->pagenum  = ceil($this->total / $this->pagesize);
        $this->page     = $this->getPage();
        $this->url      = $this->getUrl();
    }

    private function getPage() {
        $page = !empty($_GET['page']) ? $_GET['page'] : 1;
        $page = ($page > 0) ? $page : 1;
        if ($page > $this->pagenum) {
            return $this->pagenum;
        } else {
            return $page;
        }
    }

    private function getUrl() {
        $url = $_SERVER['REQUEST_URI'];
        return $url;
    }

    private function replaceUrl($page) {
        //解析url
        $param = parse_url($this->url);
        if (isset($param['query'])) {
            $route = preg_replace('/page=(\d+)/', 'page=' . $page, $this->url);
        } else {
            if ($page >= 1) {
                $route = $this->url . '?page=' . $page;
            } else {
                $route = $this->url;
            }
        }
        return $route;
    }

    //首页|第一页
    private function first() {
        if ($this->page != 1) {
            return '<a href="' . $this->replaceUrl(1) . '">首页</a>';
        } else {
            return '<span>首页</span>';
        }
    }

    //上一页
    private function prev() {
        if ($this->page == 1) {
            return '<span>上一页</span>';
        }
        return '<a href="' . $this->replaceUrl($this->page - 1) . '">上一页</a>';
    }

    //下一页
    private function next() {
        if ($this->page == $this->pagenum) {
            return '<span>下一页</span>';
        }
        return '<a href="' . $this->replaceUrl($this->page + 1) . '">下一页</a>';
    }

    //尾页
    private function last() {
        if ($this->page != $this->pagenum) {
            return '<a href="' . $this->replaceUrl($this->pagenum) . '">尾页</a>';
        }
        return '<span>尾页</span>';
    }

    //显示分页信息
    public function show() {
        header("Content-type: text/html; charset=utf-8");
        $str = '<div id="">';
        $str .= $this->first();
        $str .= $this->prev();
        if ($this->page > 1) {
            $str .= '<span>...</span>';
        }
        for ($i = 1; $i <= $this->pagenum; $i++) {
            if ($i == $this->page) {
                $str .= '<a href="' . $this->replaceUrl($i) . '" class="cur">' . $i . '</a>';
            } else {
                $str .= '<a href="' . $this->replaceUrl($i) . '">' . $i . '</a>';
            }
        }
        if ($this->page < $this->pagenum) {
            $str .= '<span>...</span>';
        }
        $str .= $this->next();
        $str .= $this->last();
        return $str;
    }
}

$page = new PageClass(15, 3);
echo $page->show();