php switch 2 variables

1$age=20;
2switch ($age) {
3	case 19:
4        echo "Age is 18";
5        break;
6    case 20:
7        echo "Age is 20";
8        break;
9    case 21:
10        echo "Age is 21";
11        break;
12}

1switch ([$color, $size]) {
2    case ['blue', 'small']:
3        echo 'blue and small';
4    break;
5
6    case ['red', 'large'];
7        echo 'red and large';
8    break;
9}

1case 'car':
2case 'ferrari':
3    print("car or ferrari");
4    break;