Question

Is this good practise … ie, grouping the default case with another?

    switch ($cond){
            case 1:
                ...;
                break;
            case 2:
                ...;
                break;
            case 3:
            default:
                ...;
                break;
        }

Answer 1

It makes perfect sense to do it that way.

Also, @Ian is correct, but in a limited scope. If you wanted additional functionality applied to case 3 you would leave it the way it is. As long as you don’t break, it will go on to the next case.