php7 void return type not working?

Question

I have a problem with return types in php7, specially \"void\".

it works with all other types, int, string, null, bool, class objects.

but when i use void it

Answer 1

Why not just use

   function printLn($a) {
    echo $a;
    return;}

It is the same as void.

You can even remove the return with just the echo