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  1. <?php 
  2. function arrayKeyPath ($searchFor, $arr, $keys=array())
  3.     {
  4.         if(!empty($arr) && is_array($arr)) {
  5.             if(isset($arr[$searchFor])) {
  6.             	print_R($keys);     // <<<<<<< NOTE
  7.                 return $keys; 
  8.             }
  9.             foreach($arr as $pKey => $a) {
  10.                 if(is_array($a)) {
  11.                     $keys[] = $pKey;
  12.                     arrayKeyPath($searchFor, $a, $keys);
  13.                 }
  14.             }
  15.         }
  16.     }
  17.  
  18.     $user['results'][0] = array (
  19.         'userId' => '1',
  20.         'firstName' => 'John',
  21.         'lastName' => 'Doe',
  22.         'options' =>
  23.             array (
  24.                 'showNews' => 'on',
  25.                 'newOptions' => array(
  26.                     'option1'=> 1,
  27.                     'option2'=> 2,
  28.                     'option3'=> 3
  29.                 ),
  30.                 'connectWithTimeFrame1' => '30',
  31.                 'defaultMessageTemplate' => '12',
  32.                 'connectWithTimeFrame' => 90,
  33.             ),
  34.     );
  35.  
  36.  
  37.  
  38. $exists = arrayKeyPath('option1', $user['results'][0]);
  39. var_dump($exists);
Success #stdin #stdout 0.03s 52480KB
comments (?)
stdin
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Standard input is empty
stdout
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Array
(
    [0] => options
    [1] => newOptions
)
NULL
https://ideone.com/fnml1S
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
public

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