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  1. <?php
  2.  
  3. $users = [
  4.  'иван',
  5.  'верьемин',
  6.  'москва',
  7.  ['английский', 'немецкий',],
  8. ];
  9.  
  10. $items = new RecursiveIteratorIterator(new RecursiveArrayIterator($users));
  11. foreach ($items as $item) {
  12.   echo mb_strtoupper($item) . "|";
  13. }
Success #stdin #stdout 0.02s 26060KB
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ИВАН|ВЕРЬЕМИН|МОСКВА|АНГЛИЙСКИЙ|НЕМЕЦКИЙ|
https://ideone.com/OXQoGI
language:
PHP (php 7.3.5)
created:
2 years ago
visibility:
public

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