MySQL读取数据到php二维数组

<?php
$conn=mysql_connect("localhost","root","123456") or die("数据库打开出错");
mysql_select_db("hellophp");
mysql_query("set names utf8");
$query="select * from hello";
$result=mysql_query($query,$conn);
$i=0;
$row=mysql_fetch_array($result);
do{
$rows[$i]=$row;
$i++;
}
while ($row=mysql_fetch_array($result));
print_r($rows);


for($i=0;$i<count($rows);$i++){
echo "<hr>";
for($j=0;$j<=2;$j++){
echo $rows[$i][$j]."&nbsp&nbsp";
}    
echo "<br>";
}
?>