PHP implementation of Game Of Life

gol.php

<?php
// Implementation
function iterate($original)
{
	$board = $original;
	for ($x = 0; $x < count($board); $x++) {
		$row = $board[$x];
		for ($y = 0; $y < count($row); $y++) {
			$cell = $row[$y];

			$live_neighbors = live_neighbors($original, $x, $y);
			if ($cell == 1) {
				// Cell is alive

				if ($live_neighbors < 2) {
					$board[$x][$y] = 0;
				} else if ($live_neighbors > 3) {
					$board[$x][$y] = 0;
				}
			} else {
				// Cell is dead

				if ($live_neighbors == 3) {
					$board[$x][$y] = 1;
				}
			}
		}
	}
	return $board;
}

function live_neighbors($board, $x, $y)
{
	$neighbors = @array(
		$board[$x-1][$y-1], $board[$x-1][$y], $board[$x-1][$y+1],
		$board[$x][$y-1], $board[$x][$y+1],
		$board[$x+1][$y-1], $board[$x+1][$y], $board[$x+1][$y+1]
	);
	return array_sum($neighbors);
}

// Assume board
$board = array(
	array(1, 0, 1),
	array(0, 1, 1),
	array(0, 0, 0)
);

print_r($board);
print_r(iterate($board));