How do I make a multi-field dynamic subject?

Hello🙂

Trying to make a form that emails with a dynamic subject with 2 field inputs, but it doesn't seem to work.

One field will be a hidden field {subject} that will just have some text (like "join request from"." The other field {name} will have the name of the person filling out the form.

So I need some way to have the dynamic subject show both fields. {subject} {name} so the dynamic subject would look like "Join Request from Bob Johnson"

When I use one or the other field, it works fine, but it won't work with both. I tried:
{subject} {name}
subject, name
subject name
and none of them output correctly.

Could someone let me know if this is possible?

Thanks very much🙂

Much appreciated, took a bit for me to figure it out since I don't speak php, but it's working🙂

Thanks a lot