上传类

<?php
class Page {
    //总条数
    private $total;
    //当前页数
    private $page;
    //当前地址
    private $url;
    //总页数
    private $pagenum;
    //每一页条数
    private $pagesize;
    //页码左右数
    private $bothnum;

public function __construct($total, $pagesize, $bothnum = 5)
    {
        $this->total = $total;
        $this->pagesize = $pagesize;
        $this->pagenum = ceil($total/$pagesize);
        $this->page = $this->getPage();
        $this->url = $this->getUrl();
        $this->bothnum = $bothnum;
    }

/**
     * 当前页码
     * @return int
     */
    private function getPage()
    {
        $page = isset($_GET['page']) ? $_GET['page'] : 1;
        if ($page < 1 || $page > $this->pagenum) {
            return 1;
        }
        return $page;
    }

/**
     * 获取地址
     * @return string
     */
    private function getUrl()
    {
        $url = $_SERVER['REQUEST_URI'];
        $parse = parse_url($url);
        if (isset($parse['query'])) {
            parse_str($parse['query'], $query);
            unset($query['page']);
            $url = $parse['path'].'?'.http_build_query($query);
        }
        return $url;
    }

/**
     * 首页按钮渲染
     * @return string
     */
    private function firstBtn()
    {
        if ($this->page == 1) {
            return '<span class="disabled">首页</span>';
        }
        return '<a href="'.$this->url.'&page=1">首页</a>';
    }

/**
     * 上一页渲染
     * @return string
     */
    private function prev()
    {
        if ($this->page == 1) {
            return '<span class="disabled">上一页</span>';
        }
        return '<a href="'.$this->url.'&page='.($this->page - 1).'">上一页</a>';
    }

/**
     * 页数列表渲染
     * @return string
     */
    private function pageList()
    {
        $html = '';
        for($i = max(1, $this->page - $this->bothnum); $i <= min($this->pagenum, $this->page + $this->bothnum); $i++){
            $html .= '<a class="'.($this->page == $i ? 'active' : '').'" href="'.$this->url.'&page='.$i.'">'.$i.'</a>';
        }
        return $html;
    }

/**
     * 下一页渲染
     * @return string
     */
    private function next()
    {
        if ($this->pagenum == $this->page) {
            return '<span class="disabled">下一页</span>';
        }
        return '<a href="'.$this->url.'&page='.($this->page + 1).'">下一页</a>';
    }

/**
     * 尾页渲染
     * @return string
     */
    private function lastBtn()
    {
        if ($this->pagenum == $this->page) {
            return '<span class="disabled">尾页</span>';
        }
        return '<a href="'.$this->url.'&page='.$this->pagenum.'">尾页</a>';
    }

/**
     * 分页渲染
     * @param string $html
     * @return string
     */
    public function showPage($html = '')
    {
        $html .= $this->firstBtn();
        $html .= $this->prev();
        $html .= $this->pageList();
        $html .= $this->next();
        $html .= $this->lastBtn();
        $html .= '<cite>共'.$this->total.'条/'.$this->pagenum.'页</cite>';
        return $html;
    }
}

$total = 1000;
$pagesize = 15;

$page = new Page($total, $pagesize);
?>

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>分页类</title>
    <style>
        .pages a.active{
            background: #4E6EF2;
            border: #4E6EF2 1px solid;
            color: #FFFFFF;
        }
        .pages a, .pages span{
            background: #FFFFFF;
            border: #EEEEEE 1px solid;
            padding: 5px 10px;
            text-decoration: none;
            margin-right: 3px;
            border-radius: 3px;
            color: #333333;
        }
        .pages .disabled{
            background: #f5f5f5 !important;
        }
        .pages cite {
            font-style: normal;
            color: #333333;
        }
    </style>
</head>
<body>
    <div class="pages">
        <?php echo $page->showPage();?>
    </div>

</body>
</html>