fork download 
  1. <?php
  2.  
  3. $root = array(
  4.     'nodes'=>array(
  5.         '1'=>array(
  6.             'id'=>'1',
  7.             'nodes'=>array(
  8.                 '4'=>array(
  9.                     'id'=>'4',
  10.                     'nodes'=>array(
  11.                         '5'=>array(
  12.                             'id'=>'5',
  13.                             'nodes'=>array()
  14.                         )
  15.                     )
  16.                 )
  17.             )
  18.         ),
  19.         '2'=>array(
  20.             'id'=>'2',
  21.             'nodes'=>array(
  22.  
  23.             )
  24.         ),
  25.         '3'=>array(
  26.             'id'=>'3',
  27.             'nodes'=>array(
  28.  
  29.             )
  30.         )
  31.     )
  32. );
  33.  
  34. foreach ($root['nodes'] as $_node_id => &$_root_node) {
  35.     $_put_parent = function (&$_node) use (&$_put_parent) {
  36.         foreach ($_node['nodes'] as $_sub_node_id => &$_sub_node) {
  37.             $_put_parent($_sub_node);
  38.             $_sub_node['parent'] = $_node;
  39.         }
  40.     };
  41.  
  42.     $_root_node['parent'] = null;
  43.     $_put_parent($_root_node);
  44. }
  45.  
  46. echo '<pre>';
  47. var_dump($root['nodes']['1']['nodes']['4']);
  48. var_dump($root['nodes']['1']['nodes']['4']['nodes']['5']['parent']);
  49. echo '</pre>';
  50.  
  51. ?>
Success #stdin #stdout 0.03s 52480KB
comments (?)
stdin 
Standard input is empty
stdout 
<pre>array(3) {
  ["id"]=>
  string(1) "4"
  ["nodes"]=>
  &array(1) {
    [5]=>
    array(3) {
      ["id"]=>
      string(1) "5"
      ["nodes"]=>
      array(0) {
      }
      ["parent"]=>
      array(2) {
        ["id"]=>
        string(1) "4"
        ["nodes"]=>
        *RECURSION*
      }
    }
  }
  ["parent"]=>
  array(3) {
    ["id"]=>
    string(1) "1"
    ["nodes"]=>
    &array(1) {
      [4]=>
      *RECURSION*
    }
    ["parent"]=>
    NULL
  }
}
array(2) {
  ["id"]=>
  string(1) "4"
  ["nodes"]=>
  &array(1) {
    [5]=>
    array(3) {
      ["id"]=>
      string(1) "5"
      ["nodes"]=>
      array(0) {
      }
      ["parent"]=>
      *RECURSION*
    }
  }
}
</pre>
https://ideone.com/vH43iD
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!