php simple delete data

---------------------------------------------------------- data : demodb server:localhost table:sinhvien (id,hoten,tuoi)
-----------------------------------
xuly.php
----------------------------------------------------------------------------
hien.php <?php $conn=mysql_connect("localhost","root",""); mysql_select_db("demodb",$conn); $qsl="select * from sinhvien"; $result=mysql_query($qsl); while($row=mysql_fetch_array($result)) { echo($row["id"].$row["hoten"].$row["tuoi"]."[html:a href=xuly.php?id=$row[id]]delete
"); } mysql_close($conn); ?>