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  1. <?php
  2.  
  3. $tree = [
  4.     1,
  5.     2,
  6.     [
  7.         3,
  8.         3
  9.     ],
  10.     [
  11.         4,
  12.         4, [
  13.             41,
  14.             42
  15.         ]
  16.     ],
  17.     5
  18. ];
  19.  
  20. $notVisited = $tree;
  21.  
  22. while ($notVisited) {
  23.     $currentElement = array_shift($notVisited);
  24.     if (is_array($currentElement)) {
  25.         $notVisited = array_merge($currentElement, $notVisited);
  26.     } else {
  27.         var_dump($currentElement);
  28.     }
  29. }
Success #stdin #stdout 0s 52488KB
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stdin
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Standard input is empty
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int(1)
int(2)
int(3)
int(3)
int(4)
int(4)
int(41)
int(42)
int(5)
https://ideone.com/6D5Zim
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
public

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