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();
?>
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