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  1. <?php
  2.  
  3. function sum(array $items): int {
  4.   $sum = 0;
  5.  
  6.   foreach ($items as $item) {
  7.     if (is_array($item)) {
  8.         $sum += sum($item);
  9.     } else if (is_int($item)) {
  10.         $sum += $item;
  11.     }
  12.   }
  13.  
  14.   return $sum;
  15. }
  16.  
  17. $input = [
  18. 	1 => [
  19. 		3 => [
  20. 			4 => [
  21. 				12 => [
  22. 					'val' => 1,
  23. 				],
  24. 				'val' => 3,
  25. 			],
  26. 			'val' => 1,
  27. 		],
  28. 		11 => [
  29. 			'val' => 1,
  30. 		],
  31. 		'val' => 3,
  32. 	],
  33. ];
  34.  
  35. echo sum($input[1]) . ' ';
  36. echo sum($input[1][3]);
Success #stdin #stdout 0.02s 24272KB
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9 5
https://ideone.com/GmA2Na
language:
PHP (php 7.3.5)
created:
4 years ago
visibility:
public

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