How to create a “key-value” with the code of the child section in a tree-like associative array for each section?

Question

PHP

Good afternoon. There is an array of categories - 93.90.220.244/update_catalog/elko.php
Each element of the array with the key ["@attributes"] stores 1 category with the keys [name] and [code].
Now the question is how to add the [code_parent] key for each category with the code value of the child section.
That is, if there is a child category with keys [code] => 1434 and [name] => "Beauty and Health", then each nested category will have a key [code_parent] with a value of 1434, as in the example below.

And so we do with each section. How to implement it?

Answer 1

function addParent($array, $parent = null) {
  foreach ($array as $key => $value) {
    if (\is_null($parent)) {
      $array[$key]['category'] = addParent($value['category'], $value['@attributes']['code']);
      $array[$key]['@attributes'] = $value['@attributes'];
    } else {
      $array[$key]['code_parent'] = $parent;
    }
  }
  return $array;
}

You would write already any class under this structure.