$arr1[0][0] = "00";
$arr1[0][1] = "01";
$arr1[1][0] = "10";
$arr1[1][1] = "11";
echo "\$arr1[0][0] = {$arr1[0][0]}
";
echo "\$arr1[0][1] = {$arr1[0][1]}
";
echo "\$arr1[1][0] = {$arr1[1][0]}
";
echo "\$arr1[1][1] = {$arr1[1][1]}
";
echo "
";
$arr2 = array{
array("00", "01"),
array("10", "11")
};
echo "\$arr2[0][0] = {$arr2[0][0]
";
echo "\$arr2[0][1] = {$arr2[0][1]
";
echo "\$arr2[1][0] = {$arr2[1][0]
";
echo "\$arr2[1][1] = {$arr2[1][1]
";