//Page.class.php(分頁類封裝)------------------------------
<?php 
header("Content-Type:text/html;charset=utf-8");
class Page{
    public $total; //總記錄數
    public $page_size; //每頁顯示記錄數
    public $total_page; //總頁數
    public $cur_page;   //當前頁

    //定義構造方法，給成員屬性賦初值
    function __construct($total,$page_size){
        $this
 
->total = $total;
        $this->page_size = $page_size;
        $this->total_page = $this->getTotalPage();
        $this->cur_page = $this->getCurPage();
    }
    //定義出口程式，用於輸出分頁類的效果
    function pages(){
        echo "共".$this->total_page."頁&nbsp;
             當前第".$this->cur_page."頁&nbsp;"
 

             .$this->flist()
             .$this->listNum()
             .$this->llist();
    }

    //定義成員方法，獲取總頁數
    private function getTotalPage(){
        //ceil(總記錄數/每頁顯示記錄數)
        $total_page = ceil($this->total/$this->page_size);
        return $total_page;
    }

    //獲取當前頁
    private
 
 function getCurPage(){
        //http://localhost/Page.class.php
        $cur_page = isset($_GET['p'])?$_GET['p']:1;
        //$cur_page = 1
        //$this->total_page = 0
        //對當前頁的取值進行判斷
        if($cur_page<1){
            $cur_page=1;
        }else if($cur_page>$this->total_page&&$this->total_page!=0){
            $cur_page=$this->total_page;

        }
         return $cur_page;     
    }
    // 1 2 3 4 5 6 7
    private function listNum(){
        //定義佇列長度
        $num = 3;
        //1 2 3
        $lists = "";
        for($i=$num;$i>=1;$i--){
            $n = $this->cur_page-$i;
            if($n>=1){
                $lists.="&nbsp;<a href='?p=".$n."'>$n</a>&nbsp;";
            }
        }

        //連線上當前頁
        $lists .= "&nbsp;".$this->cur_page."&nbsp;";
        //5 6 7
        for($i=1;$i<=$num;$i++){
            //$n = 11+1=12
            $n = $this->cur_page+$i;
            if($n<=$this->total_page){
                $lists.="&nbsp;<a href='?p=".$n."'>$n</a>&nbsp;";
            }
        }
        return $lists;
    }

    //首頁 上一頁
    private function  flist(){
        //$prev = 1-1 = 0
        //$prev = 2-1 = 1
        $prev = $this->cur_page-1;
        $lists = "";
        if($prev>=1){      
            $lists = "<a href='?p=1'>首頁</a>&nbsp;
                  <a href='?p=".$prev."'>上一頁</a>";
        }
        return $lists;
    }

    //下一頁 尾頁
    private function  llist(){
        //$next = 10+1 = 11
        //$next = 11+1 = 12
        $next = $this->cur_page+1;
        $lists = "";               
        if($next<=$this->total_page){
            $lists = "&nbsp;<a href='?p=".$next."'>下一頁</a>&nbsp;
                  <a href='?p=".$this->total_page."'>尾頁</a>";
        }
        return $lists;
    }
}
//總記錄數52
$total = 52;
//每頁顯示的記錄數
$page_size = 5;
$p = new Page($total,$page_size);
$p->pages();