Referencing Keys in an Array

Hello Treehouse,

I've hit a wall trying to finish a personal project and I'm hoping someone can provide some guidance.

I'm building something similar to the Shirts Catalog in the php project; using arrays to show a list of different items. In the Creating the Products Array video, Randy mentions that we are assigning a specific key to each item so we can reference them later on, something you would do with a SKU or product id.

I'm wondering how you go about accessing those values, and mainly if it is possible to access the value from within the array itself. I have to use a code multiple times within each array (key, part of a filename, and part of an image-path). Rather than copy-paste the key 2 more times, I'd like to just call upon the key and have it echo automatically.

Example Code:

$items = array();

$items["codeword"] = array(
  "file" => "codeword.doc",
  "img" => "/group/img/codeword.jpg"
$items["secrettext"] = array(
  "file" => "secrettext.doc",
  "img" => "/group/img/secrettext.jpg"

The code above is simplified, but essentially I want to replace the last two "codeword"s with a reference to the array's key. It would save a lot of time in the long-run to be able to do this, so I'm hoping it's possible.

Thanks in advance, Jeff