Delete data using core php ?

<?php
 if(isset($_REQUEST['del_id']))
 {
    $del=$_REQUEST['del_id'];
     $de="delete from user where uid='$del'";
    $ex=mysql_query($del);     header("location:view.php");
 }


?>
< html>
< body>
<form method="post" name="form1" >
< table width="200" align="center" class="frm_tbl">
  <tr>
    <td>Uid</td>
    <td>Name</td>
    <td>Password</td>
    <td>Gender</td>
    <td>Hobby</td>
  </tr>
<?php
while($r = mysql_fetch_array($ex))
{
?>
  <tr>
     <td><?php echo $r['uid']; ?></td>
    <td><?php echo $r['name']; ?></td>
    <td><?php echo $r['password']; ?></td>
    <td><?php echo $r['Gender']; ?></td>
    <td><?php echo $r['Hobby']; ?></td>
  <td><a href="view.php?del_id=<?php echo $r['uid']; ?>">delete</td>
  </tr>
<?php
}
?>
< /table>
</form>