Simple board issue?

[The_Kez]

Right now I'm working on a script that requires me to be updating a board. So I'm using a series of arrays (6x6) to act as a board.
The problem is that I can't seem to be able to update it at all. I have a script which looks like this:

PHP Code:

//#CLIENTSIDE
function onFunc() {
  board = {
    { 0, 0, 0, 0, 0, 0 },
    { 0, 0, 0, 0, 0, 0 },
    { 0, 0, 0, 0, 0, 0 },
    { 0, 0, 0, 0, 0, 0 },
    { 0, 0, 0, 0, 0, 0 },
    { 0, 0, 0, 0, 0, 0 }
  };
  board[0][0] = 1;
  echo( board[0][0] ); //returns 0 ??
} 


Is there something I need to keep in mind when editing nested arrays?