Dynamic multidimensional post form

Example of using multidimensional array forms:

<form method="post" action="">
      <input name="data[111][222]" value="2" />
      <input name="data[112][221]" value="0" />
      <input name="data[113][223]" value="4" />
      <input name="data[324][435]" value="11" />
      <input name="data[325][436]" value="" />
      <input type="submit" />
</form>
<?php
foreach ($_POST['data'] as $k1 => $v1)
{
    foreach ($v1 as $k2 => $v2)
    {
        echo "<p>k1:".$k1."; k2: ".$k2."; value: ".$v2."</p>";
        $query = "update table set res='$v2' where row='$k1' and col='$k2'";
        mysql_query($query);
    }
}
?>