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  1. <?php
  2.  
  3. function flattenArray($arr) {
  4. 	$output = [];
  5.  
  6. 	foreach ($arr as $key => $value) {
  7. 		if (is_array($value)) {
  8. 			foreach(flattenArray($value) as $flattenKey => $flattenValue) {
  9. 				$output["${key}.${flattenKey}"] = $flattenValue;
  10. 			}
  11. 		} else {
  12. 			$output[$key] = $value;
  13. 		}
  14. 	}
  15.  
  16. 	return $output;
  17. }
  18.  
  19. $arr = [
  20.     'applicant' => [
  21.         'user' => [
  22.             'username' => true,
  23.             'password' => true,
  24.             'data' => [
  25.                 'value' => true,
  26.                 'anotherValue' => true
  27.             ]
  28.         ]
  29.     ]
  30. ];
  31.  
  32. var_dump(flattenArray($arr));
Success #stdin #stdout 0.04s 52480KB
comments (?)
stdin 
Standard input is empty
stdout 
array(4) {
  ["applicant.user.username"]=>
  bool(true)
  ["applicant.user.password"]=>
  bool(true)
  ["applicant.user.data.value"]=>
  bool(true)
  ["applicant.user.data.anotherValue"]=>
  bool(true)
}
https://ideone.com/Ikxx4v
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
public

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