关于分页的类（有点粗糙）

<?php
class page
{
   public $tab;       //表名
   public $row;       //数据
   public $page;       //当前页
   public $totalpage;   //总页数
   public $totalsize;   //总条数
   public $pageindex;   //查找索引
   public $pagesize;   //每页显示条数
   public $lastpage;   //上一页
   public $nextpage;   //下一页
   function __construct($tab,$pagesize)
   {
       mysql_connect("127.0.0.1","root","123456");
       mysql_select_db("baonier");
       $this->tab=$tab;
       $this->pagesize=$pagesize;
       $sql="select * from ".$this->tab."";
       $query=mysql_query($sql);
       echo $this->totalsize=mysql_num_rows($query);
       $this->totalpage=ceil($this->totalsize/($this->pagesize-1));
       $this->page=isset($_GET['page'])?$_GET['page']:1;

       $this->pageindex=($this->page-1)*$this->pagesize;
       $this->lastpage=$this->page-1;
       $this->nextpage=$this->page+1;

   }
   function get_array()
   {
       $sql="select * from ".$this->tab." limit ".$this->pageindex.",".$this->pagesize."";
       $q=mysql_query($sql);
       $roww=array();
       while($rows=mysql_fetch_array($q))
       {
           $roww[]=$rows;
       }
       $this->row=$roww;
       return $this->row;
   }
   function get_page()
   {
       if($this->lastpage<1)
       {
           $this->lastpage=1;
       }
       if($this->nextpage>$this->totalpage)
       {
           $this->nextpage=$this->totalpage;
       }
       $div="<a href="?page=".$this->lastpage." ">上一页</a><a href="?page=".$this->nextpage."">下一页</a>";
       return $div;
   }
}
?>