Sudoku.php

<!DOCTYPE html>
<html lang="en">

<head>
	<title> Sudoku </title>
	<link type="text/css" rel="stylesheet" href="sudoku.css">
</head>

<body>

<h2 id = "title" class="center"> Sudoku </h2>

<table>

<?php

$cells = array_fill(0, 9, array_fill(0, 9, 9));

for($i=0; $i<9; $i++){
	for($k=0; $k<9; $k++) {
			$cells[$i][$k] = 'c' . "$i" . "$k";
	}
} // fill $cells with XY coordinates of each cell

for($i=0;$i<9;$i++){
	echo "<tr>";
	for($k=0;$k<9;$k++){
		echo '<td><div class = "cell" id="' . $cells[$i][$k] . '">' . '</div>';
	}
} // creates the grid, each cell containing a <div> with an ID

?>

</table>
<script src = "sudoku.js"> </script>
</body>
</html>