一个odbc连mssql分页的类

<!--二泉.net -->
<?
class pages{
    var $cn;        //连接数据库游标
    var $d;            //连接数据表的游标
    var $result;    //结果
    var $dsn;        //dsn源
    var $user;        //用户名    
    var $pass;        //密码

    var $total;        //记录总数
    var $pages;        //总页数
    var $onepage;    //每页条数
    var $page;        //当前页
    var $fre;        //上一页
    var $net;        //下一页
    var $i;            //控制每页显示

    function getconnect($dsn,$user,$pass){
        $this->cn=@odbc_connect($dsn,$user,$pass);
        if(!$this->cn){
            $error="连接数据库出错";
            $this->getmess($error);
        }
    }

    function getdo($sql){//从表中查询数据
        $this->d=@odbc_do($this->cn,$sql);
        if(!$this->d){
            $error="查询时发生了小错误......";
            $this->getmess($error);
        }
        return $this->d;
    }

    function gettotal($sql){
        $this->sql=$sql;
        $dt=$this->getdo($this->sql);        //求总数的游标
        $this->total=odbc_result($dt,'total');//这里为何不能$this->d呢？
        return $this->total;
    }

    function getlist($sql,$onepage,$page){
        $this->s=$sql;
        $this->onepage=$onepage;
        $this->page=$page;
        $this->dlist=$this->getdo($this->s);    //连接表的游标
        $this->pages=ceil($this->total/$this->onepage);
        if($this->pages==0)
            $this->pages++; //不能取到第0页
        if(!isset($this->page))
            $this->page=1;
        $this->fre = $this->page-1;                    //将显示的页数
        $this->nxt = $this->page+1;
        $this->nums=($this->page-1)*$this->onepage;
        //if($this->nums!=0){
        //    for($this->i=0;$this->i<$pg->getnums();odbc_fetch_row($this->dd),$this->i++);//同上
        //}
        //$this->i=0;//为何这部分不能封装？
        return $this->dlist;
    }

    function getfanye(){
        $str="";
        if($this->page!=1)
            $str.="<a href=".$php_self."?page=1> 首页 </a><a href=".$php_self."?page=".$this->fre."> 前页 </a>";
            else
                $str.="<font color=999999>首页 前页</font>";
        if($this->page<$this->pages)
            $str.="<a href=".$php_self."?page=".$this->nxt."> 后页 </a>";
            else
                $str.="<font color=999999> 后页 </font>";
        if($this->page!=$this->pages)
            $str.="<a href=".$php_self."?page=".$this->pages."> 尾页 </a>";
            else
                $str.="<font color=999999> 尾页 </font>";

        $str.="共".$this->pages."页";
        $str.="您正浏览第<font color=red>".$this->page."</font>页";
        return $str;
    }

    function getnums(){
        return $this->nums;
    }

    function getonepage(){//每页实际条数
        return $this->onepage;
    }

    function geti(){
        return $this->i;
    }

    function getpage(){
        return $this->page;
    }

    function getmess($error){//定制消息
        echo"<center>$error</center>";
        exit;
    }
}

$pg=new pages();
$pg->getconnect("lei","sa","star");
$pg->gettotal("select count(*) as total from xs");            //连学生表求总数
$pg->getlist("select xs_name from xs order by xs_id",8,$page);
if($pg->getnums()!=0){
    for($i=0;$i<$pg->getnums();odbc_fetch_row($pg->dlist),$i++);//同上
}
$i=0;
while(odbc_fetch_row($pg->dlist)){
    $name=odbc_result($pg->dlist,"xs_name");
    echo $name."<br>";
    if($i==$pg->getonepage()){//跳出循环
        break;
    }
    $i++;
}
echo$pg->getfanye();
?>