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  1. <?php
  2.  
  3.     function count_element_children(&$content){
  4.  
  5.         if(!isset($content['children'])){
  6.             return 1;
  7.         }
  8.         else{
  9.             foreach($content['children'] as &$child){
  10.                 $content['children_count'] += count_element_children($child) + $child['children_count'];    
  11.             }
  12.  
  13.         }
  14.     } 
  15.  
  16. $table = [
  17. 1 => [
  18.     'id' => 1,
  19.     'children_count' => 0
  20. ],
  21. 2 => [
  22.     'id' => 2,
  23.     'children_count' => 0,
  24.     'children' => [
  25.         3 => [
  26.             'id' => 3,
  27.             'children_count' => 0,
  28.             'children' => [
  29.                 4 => [
  30.                     'id' => 4,
  31.                     'children_count' => 0,
  32.                     'children' => [
  33.                         5 => [
  34.                             'id' => 5,
  35.                             'children_count' => 0
  36.                         ],
  37.  
  38.                         6 => [
  39.                             'id' => 6,
  40.                             'children_count' => 0
  41.                         ]
  42.                     ]
  43.                 ]
  44.             ]],
  45.         7 =>  [
  46.                             'id' => 7,
  47.                             'children_count' => 0
  48.                         ],       
  49.  
  50.     ]
  51.  
  52. ]    
  53. ];
  54.  
  55. foreach($table as &$element){
  56. 	if(isset($element['children'])) count_element_children($element);
  57. }
  58.  
  59. var_dump($table);
Success #stdin #stdout 0.02s 24448KB
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array(2) {
  [1]=>
  array(2) {
    ["id"]=>
    int(1)
    ["children_count"]=>
    int(0)
  }
  [2]=>
  &array(3) {
    ["id"]=>
    int(2)
    ["children_count"]=>
    int(3)
    ["children"]=>
    array(2) {
      [3]=>
      array(3) {
        ["id"]=>
        int(3)
        ["children_count"]=>
        int(2)
        ["children"]=>
        array(1) {
          [4]=>
          array(3) {
            ["id"]=>
            int(4)
            ["children_count"]=>
            int(2)
            ["children"]=>
            array(2) {
              [5]=>
              array(2) {
                ["id"]=>
                int(5)
                ["children_count"]=>
                int(0)
              }
              [6]=>
              array(2) {
                ["id"]=>
                int(6)
                ["children_count"]=>
                int(0)
              }
            }
          }
        }
      }
      [7]=>
      array(2) {
        ["id"]=>
        int(7)
        ["children_count"]=>
        int(0)
      }
    }
  }
}
https://ideone.com/fEGLiT
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
public

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