Go to default case from another case in PHP

It is possible to go to default case from within some other case like this?

$a = 0;
$b = 4;
switch ($a) {
    case 0:
        if ($b == 5) {
            echo "case 0";
            break;
        }
        else
            //go to default
    case 1:
        echo "case 1";
        break;
    default:
        echo "default";
}

I tried to remove the else and was expecting that it would continue evaluating all following cases until default but it gets into case 1 then. Why is it so and how can I get to the default one?

Answer

Yes you can if you reorder the case statements:

switch ($a) {
    case 1:
        echo "case 1";
        break;
    case 0:
        if ($b == 5) {
            echo "case 0";
            break;
        }
    default:
        echo "default";
}

Why is it so: it is defined, if you de not have a break statement the next case will be executed. If there is no more case, the default will be executed if one is defined