Add array in array recursively?

I am totally stuck! I've been trying all day to make the following work:

I have a POST collection that contains some inputboxes. These inputboxes have a name like: root|element1|subelement1

I split this name into an array list and that gives me:
$elements[0] = root
$elements[1] = element1
etc

Now I want to create an array list that looks like this from the $elements list:

Array
(
[root] => Array
(
[element1] => Array
(
[subelement1] => inputbox value
)

)

)

Basically, what I want to do is:
$arrTest['root']['element1']['subelement1'] = 'inputbox value';

I can't seem to create an array dynamically. I need to do it dynamically because I don't know how many elements will be returned from the inputbox name.

Hope this explains it and someone can help me...

 

The trick does actually lay in your HTML form.

<input type="text" name="root[element][subelement]" />

HTML:

 

Yep that does the trick!!!
Can't thank you enough for saving my day

Thanks!

 

You're welcome. Glad I could help.