echo '<table border="1">';
for ($column = 0; $column <= 9; $column++)
{
	echo '<tr>';

	for ($row = 0; $row <= 9; $row++)
		echo '<td>', empty($column) && empty($row) ? '+' : ($column + $row), '</td>';

	echo '<tr>';
}
echo '</table>';

echo '<table border="1">';
for ($column = 0; $column <= 9; $column++)
{
	echo '<tr>';

	for ($row = 0; $row <= 9; $row++)
		echo '<td>', empty($column) && empty($row) ? 'X' : (($column == 0 ? 1 : $column) * ($row == 0 ? 1 : $row)), '</td>';

	echo '<tr>';
}
echo '</table>';

echo '<table border="1">';
for ($column = 0; $column <= 9; $column++)
{
	echo '<tr>';

	for ($row = 0; $row <= 9; $row++)
	{
		$value = $column + $row;

		echo '<td style="background-color: rgb(250, ', $column * 30, ', ', $row * 20, ');">', empty($column) && empty($row) ? '+' : $value, '</td>';
	}

	echo '<tr>';
}
echo '</table>';