latihan fungsi delete baris

<?php
$dbhost="localhost";
$dbuser="root";
$dbpasw="";
$dbname="latihan";
$link=mysql_connect($dbhost,$dbuser,$dbpasw);
mysql_select_db($dbname,$link);

function delete_row($table,$field,$value){
    $sql="DELETE FROM $table WHERE $field='$value'";
    $ret=mysql_query($sql);
    return $ret;
}
if(!empty($_GET['id'])){
    delete_row('prodi','kd_prodi',$_GET['id']);
}
?>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Latihan Fungsi Delete Baris</title>
</head>
<body>
  <table width="200" border="1">
    <tr>
      <td>Prodi</td>
      <td>Nama</td>
      <td>Delete</td>
    </tr>
<?php
    while($k=mysql_fetch_array($q)){
        echo "<tr>\n";
        echo "<td>".$k['kd_prodi']."</td>\n";
        echo "<td>".$k['prodi']."</td>\n";
        echo "<td><a href=\"".$SERVER['PHP_SELF']."?id=".$k['kd_prodi']."\">hapus</a></td>\n";
        echo "</tr>\n";
    };
?>
  </table>
</body>
</html>