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Making changes to a nested array that may have arrays or strings in some values

Pulled this from the test module for the new RDF module we're putting in Drupal core.

// dealing with a nested array where the top level can be a string or an
// array is complex and helper functions may be a good addition

  rdf_mapping_alter_create('rdf_test_container', 'title', )

 * Make adding an attribute and property sane.  $prop can be an array.
function rdf_mapping_alter_create($container, $attr, $prop, &$mapping) {
  if (isset($mapping[$container])) {
    if (isset($mapping[$container][$attribute])) {
      $mapping[$container][$attr] = (array)$mapping[$container][$attr];

//      isset($mapping['rdf_test_container']['created'][

  // @TODO test this
  // what happens if we try to unset something that isn't there?


Searched words: 
array merge recursive preserve override


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