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  1. <?php
  2.  
  3. $array = array(
  4.     'files' => array(
  5.         'a' => array(
  6.             'ab' => array(
  7.                 0 => 'ab.jpg',
  8.             ),
  9.             0 => 'abc.jpg',
  10.         ),
  11.         'b' => array(
  12.             'ba' => array(
  13.                 'bac' => array(
  14.                     0 => 'abc.jpg',
  15.                 ),
  16.                 'bac' => array(
  17.                     0 => 'abd.jpg',
  18.                 ),
  19.             ),
  20.         ),
  21.     ),
  22. );
  23.  
  24. var_dump(array_search_key_recursive('bac', $array));
  25.  
  26. function array_search_key_recursive($key, array $array) {
  27.     foreach ($array as $i => $child) {
  28.         if ($i === $key) {
  29.             return $i;
  30.         }
  31.         if (!is_array($child)) {
  32.             continue;
  33.         }
  34.         if (false !== $j = array_search_key_recursive($key, $child)) {
  35.             return "{$i}->{$j}";
  36.         }
  37.     }
  38.     return false;
  39. }
Success #stdin #stdout 0.01s 20520KB
comments (?)
stdin 
Standard input is empty
stdout 
string(17) "files->b->ba->bac"
https://ideone.com/T2Obqg
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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