How do I make this work?

[Rob68123]

Update page from a page with forms...

$DBUpdate = array();
for ($x = 1; $x <= $RSCountVar; $x++) {
  for ($y = 1; $y <= 16; $y++) {
              $DBUpdates[$x][$y] = $_POST['DataX$xY$y'];
              echo $DBUpdates[$x][$y] . "<br />\n";
  }
}

Please help, I don't understand how to put a variable inside $_POST['text'], anyone?