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PHP之簡單的分頁類

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pageClass.php

<?php

class Page{

    private $total;//總條數
    private $size;//每頁條數
    private $pageCount;//總頁數
    private $currentPage;//當前頁碼

    private $showPages = 2;//顯示的頁碼,當前頁面左右各2,就是5頁
    private $pageStart;//顯示頁碼的開始
    private $pageEnd;//顯示頁碼的結束

    public function __construct($total,$size,$currentPage){
        $this->total = $total;
        $this->size = $size;
        $this->pageCount=ceil($total/$size);
        $this->currentPage=$currentPage;

        $this->pageStart = $this->currentPage-$this->showPages;
        $this->pageEnd = $this->currentPage+$this->showPages;

        //如果起始頁碼小於1那麽就設定為1
        if($this->pageStart<=1){
            //難點

            $this->pageEnd = $this->pageEnd+(1-$this->pageStart);
            $this->pageStart=1;

        }

        //如果結束頁大於總頁數,重置結束頁=總頁數
        if($this->pageEnd>=$this->pageCount){

            //難點
            if($this->pageCount<$this->showPages*2+1){
                $this->pageStart=1;
            }else{
                $this->pageStart=$this->pageStart-($this->pageEnd-$this->pageCount);
            }

            $this->pageEnd=$this->pageCount;

        }

    }

    public function Pages(){

        $str=‘<div id=page>‘;
        $str.= $this->home();
        $str.= $this->lastPage();
        $str.= $this->numPage();
        $str.= $this->nextPage();
        $str.= $this->last();
        $str.= $this->countTotal();
        $str.=‘</div>‘;
        return $str;
    }

    //首頁
    private function home(){
        if($this->currentPage==1){
            $str = ‘<p>首頁</p>‘;
        }else{
            $str = ‘<a href=?page=1>首頁</a>‘;
        }

        return $str;
    }

    //上一頁
    private function lastPage(){
        if($this->currentPage==1){
            $str = ‘<p>上一頁</p>‘;
        }else{
            $str = ‘<a href=?page=‘.($this->currentPage-1).‘>上一頁</a>‘;
        }

        return $str;
    }

    //中間的數字頁
    private function numPage(){
        $str=‘<p class="pageRemark">... </p> ‘;

        for($i=$this->pageStart;$i<=$this->pageEnd;$i++){
            if($i==$this->currentPage){
                $str.=‘<a class="cur" href=?page=‘.$i.‘>‘.$i.‘</a>‘;
            }else{
                $str.=‘<a href=?page=‘.$i.‘>‘.$i.‘</a>‘;
            }

        }
        $str.=‘<p class="pageRemark">...</p> ‘;
        return $str;
    }

    //下一頁
    private function nextPage(){
        if($this->currentPage==$this->pageCount){
            $str = ‘<p>下一頁</p>‘;
        }else{
            $str = ‘<a href=?page=‘.($this->currentPage+1).‘>下一頁</a>‘;
        }

        return $str;
    }

    //末頁
    private function last(){
        if($this->currentPage==$this->pageCount){
            $str = ‘<p>末頁</p>‘;
        }else{
            $str = ‘<a href=?page=‘.$this->pageCount.‘>末頁</a>‘;
        }

        return $str;
    }

    //統計
    private function countTotal(){
        return ‘<p class="pageRemark">共<b>13</b>頁<b>100</b>條數據</p>‘;
    }

}

調用 page.php

<?php
    //引入分頁類
    require_once ‘pageClass.php‘;
    //鏈接數據庫
    try{
        $db = new PDO(‘mysql:host=127.0.0.1;dbname=shop;charset=utf8;port=3306‘,‘root‘,‘root‘);

    }catch(PDOException $e){
        echo ‘mysql error:‘.$e->getMessage();
    }

    $sql = ‘select * from student‘;
    $stmt = $db->prepare($sql);
    $stmt->execute();
    //獲取總條數
    $total = $stmt->rowCount();
    $size = 5;//每頁條數      0,8;    8,8    16,8
    //如果不存在第一頁,則默認第一頁
    isset($_GET[‘page‘])?$currentPage = $_GET[‘page‘]:$currentPage=1;
    $sql.=" limit ".($currentPage-1)*$size.",$size";

    $stmt = $db->prepare($sql);
    $stmt->execute();
    //查詢結果集
    $res = $stmt->fetchAll(PDO::FETCH_ASSOC);

?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
    p{margin:0}
    #page{height:40px;padding:20px 0px;}
    #page a{display:block;float:left;margin-right:10px;padding:2px 12px;height:24px;border:1px #cccccc solid;background:#fff;text-decoration:none;color:#808080;font-size:12px;line-height:24px;}
    #page a:hover{color:#077ee3; border:1px #077ee3 solid;}
    #page a.cur{border:none;background:#43badb;color:#fff;}
    #page p{float:left;padding:2px 12px;font-size:12px;height:24px;line-height:24px;color:#bbb;border:1px #ccc solid;background:#fcfcfc;margin-right:8px;}
    #page p.pageRemark{border-style:none;background:none;margin-right:0px;padding:4px 0px;color:#666;}
    #page p.pageRemark b{color:red;}
    #page p.pageEllipsis{border-style:none;background:none;padding:4px 0px;color:#808080;}
    </style>

</head>
<body>

<?php

    echo ‘<table>‘;
    echo ‘<tr><th>ID</th><th>姓名</th><th>Emai</th><th>手機號</th></tr>‘;
    foreach($res as $k=>$v){
        echo ‘<tr><td>‘.$v[‘id‘].‘</td><td>‘.$v[‘name‘].‘</td><td>‘.$v[‘email‘].‘</td><td>‘.$v[‘mobile‘].‘</td></tr>‘;
    }
    echo ‘</table>‘;

$page = new Page($total,$size,$currentPage);
echo $page->Pages();

?>

</body>
</html>

PHP之簡單的分頁類