新手学php，下了一个风雨飘然我留言板学习，具体代码如下：
..............
include "dbpath/dbpath.php" ;
$query="select * from book order by id desc";
$result=mysql_query("$query",$connection) or die (“浏览失败！);
$count = 1;
while($row=mysql_fetch_array($result)){
$gb[$count][id]=$row[id];
$gb[$count][name]=$row[name];
$gb[$count][email]=$row[email];
$gb[$count][homepage]=$row[homepage];
$gb[$count][face]=$row[face];
$gb[$count][subject]=$row[subject];
$gb[$count][memo]=$row[memo];
$gb[$count][oicq]=$row[oicq];
$gb[$count][ip]=$row[ip];
$gb[$count][time]=$row[time];
$gb[$count][anser]=$row[anser];
$gb[$count][ansertime]=$row[ansertime];
$count++;
}
mysql_close($connection) or die ("无法断开与数据库的连接！");
$count = count($gb);
$msgPerPage = 10;
$totalpage= ceil($count/$msgPerPage);

出错：
Notice: Undefined variable: gb in C:\phpweb\fuoccphp-3\book.php on line 32
也即是红色代码行处。
请问是什么问题？