I'm attempting to populate my associative arrays dynamically, does anyone know if this is possible please?

e.g. I'd like the associative array

delimeter["dynamically_created"][1] = stuff;

but, writing:

$dynamically_created = "stuff";
$delimiter[$dynamically_created][1] = "stuff";

doesn't seem to do it?

Do you know how to do this please?

I've noticed it's poss. to create them dynamically if I use integers, but I'd like to use strings.