急求PHP分页赋值有关问题.大大帮助解决一下.了给分附代码等待5个小时了还没解决 大家帮帮忙

$conn=mysql_connect("localhost","root","toma123") or die("连接错误");  
mysql_select_db("cs",$conn);
mysql_query("set names 'GBK'");
mysql_query("set characher set gb2312");
mysql_query("set names gb2312");

$md=$_GET['key'];



if($md!=""){

$sql="select * from ud8 where title like '%$md%'"; 

$result=mysql_query($sql);

$sst=mysql_fetch_array($result);

$num=mysql_num_rows($result); //统计行数 

$pages=ceil($num/8); //总页数 

$page=$_GET['page']; //获得page，如果没有设置或者page=0，把$page=1;

if($page=="")
{  
$page=1;
}

$start=($page-1)*8;

$sql="select * from ud8 where title like '%$md%' limit ".$start.",". 8;

$query=mysql_query($sql); 
   
while($sumpage=mysql_fetch_array($query)){ 
  
$id=$sumpage['id'];

$dd=$id;  



?>