PHP：多维数组，多维键？

Question

$products = array(
  'paper' => "Paper Section" => array
  (
    'copier' => "Copier and Multipurpose",
    'inkjet' => "Inkjet Printer",
  ),
  'pens' => "Pen Section" => array
  (
    'ball' => "Ballpoint Pens",
    'hilite' => "Highlighters"
  ),
  'misc' => "Miscellaneous Section" => array
  (
    'tape' => "Sticky Tape",
    'glue' => "Adhesive"
  )
);

echo "<pre>";
foreach ($products as $section => $items)
  foreach ($items as $key => $value)
    echo "$section:\t$key\t($value)<br />";
echo "</pre>";

Obviously what I'm trying to do here is assign indexes to the $section set, and I'm getting errors for trying to do that. Is there another way to do it, or is it just not possible in PHP?

Answer 1

$products = array(
  'paper' => array(
    'title' => "Paper Section",
    'copier' => "Copier and Multipurpose",
    'inkjet' => "Inkjet Printer"
  )
);   

Something like the above, for instance. Another option is adding another dimension:

$products = array(
  'paper' => array(
    'meta' => array(
        'title' => "Paper Section"
    ),
    'data' => array(
        'copier' => "Copier and Multipurpose",
        'inkjet' => "Inkjet Printer"
    )
  )
);