PHP之简单的分页类

pageClass.php

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;

        //如果起始页码小于1那么就设定为1
        if($this->pageStart<=1){
            //难点

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

        }

        //如果结束页大于总页数，重置结束页=总页数
        if($this->pageEnd>=$this->pageCount){

            //难点
            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='
';
        $str.= $this->home();
        $str.= $this->lastPage();
        $str.= $this->numPage();
        $str.= $this->nextPage();
        $str.= $this->last();
        $str.= $this->countTotal();
        $str.='
';
        return $str;
    }

    //首页
    private function home(){
        if($this->currentPage==1){
            $str = '
首页
';
        }else{
            $str = '首页';
        }

        return $str;
    }

    //上一页
    private function lastPage(){
        if($this->currentPage==1){
            $str = '
上一页
';
        }else{
            $str = 'currentPage-1).'>上一页';
        }

        return $str;
    }

    //中间的数字页
    private function numPage(){
        $str='
... 
 ';

        for($i=$this->pageStart;$i<=$this->pageEnd;$i++){
            if($i==$this->currentPage){
                $str.=''.$i.'';
            }else{
                $str.=''.$i.'';
            }

        }
        $str.='
...
 ';
        return $str;
    }

    //下一页
    private function nextPage(){
        if($this->currentPage==$this->pageCount){
            $str = '
下一页
';
        }else{
            $str = 'currentPage+1).'>下一页';
        }

        return $str;
    }

    //末页
    private function last(){
        if($this->currentPage==$this->pageCount){
            $str = '
末页
';
        }else{
            $str = 'pageCount.'>末页';
        }

        return $str;
    }

    //统计
    private function countTotal(){
        return '
共13页100条数据
';
    }

}

调用 page.php

getMessage();
    }

    $sql = 'select * from student';
    $stmt = $db->prepare($sql);
    $stmt->execute();
    //获取总条数
    $total = $stmt->rowCount();
    $size = 5;//每页条数      0,8;    8,8    16,8
    //如果不存在第一页，则默认第一页
    isset($_GET['page'])?$currentPage = $_GET['page']:$currentPage=1;
    $sql.=" limit ".($currentPage-1)*$size.",$size";

    $stmt = $db->prepare($sql);
    $stmt->execute();
    //查询结果集
    $res = $stmt->fetchAll(PDO::FETCH_ASSOC);

?>



    
    
    




';
    echo 'ID姓名Emai手机号';
    foreach($res as $k=>$v){
        echo ''.$v['id'].''.$v['name'].''.$v['email'].''.$v['mobile'].'';
    }
    echo '';

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

?>