php动态生成表格的合并

<?php
$link=mysql_connect("localhost","root","root");
$db=mysql_select_db("bustest",$link);
$sql1="select name from info group by name order by id asc";
print("<table border='1'>");
$res1=mysql_query($sql1);
while($row1=mysql_fetch_array($res1)){
$name=$row1["name"];
$sql2="select id from info where name ='$name' order by id asc";
$res2=mysql_query($sql2);
while($row2=mysql_fetch_array($res2)){
print("<tr>");
$id=$row2["id"];
print("<td>$id</td>");
$sql3="select count(*),id from info where name ='$name' group by name order by id asc";
$res3=mysql_query($sql3);
while($row3=mysql_fetch_array($res3)){
$id1=$row3["id"];
if($id1==$id){
$num=$row3[0];
print("<td rowspan='$num' >");
print $name;
print("</td>");
}else{
print("</tr>");
}
}
}
print("</tr>");
}
print("</table>");
mysql_close($link);
?>