php - Create a nested array -


i have table below

  • id
    • 1
    • 2
    • 4
  • title
    • home page
    • about
    • deneme
  • slug
    • home
    • about
    • deneme
  • order
    • 1
    • 2
    • 1
  • body
    • loremp ipsum
    • dot sit
    • color amet
  • parent_id
    • 2
    • 0
    • 0

now, want create nested array table. function below

public function get_nested () {     $pages = $this->db->get('pages')->result_array();     $array = array();     foreach ($pages $page) {         if (! $page['parent_id']) {             $array[$page['id']] = $page;         }         else {             $array[$page['parent_id']]['children'][] = $page;          }     }     return $array; } dump($array);

when dump $array

dump => array(2) { [2] => array(6) { ["id"] => string(1) "2" ["title"] => string(5) "about" ["slug"] => string(5) "about" ["order"] => string(1) "2" ["body"] => string(241) "lorem ipsum dolor sit amet, consectetur adipisicing elit. ipsam itaque cumque ullam eum atque consectetur voluptates veritatis sapiente voluptatem voluptatibus neque, commodi reprehenderit odit dignissimos omnis, veniam et deserunt incidunt!" ["parent_id"] => string(1) "0" } [4] => array(6) { ["id"] => string(1) "4" ["title"] => string(6) "deneme" ["slug"] => string(6) "deneme" ["order"] => string(1) "1" ["body"] => string(13) "deneme" ["parent_id"] => string(1) "0" } }

there 2 page list in array there 3 page 1 has parent_id. page has parent_id not showing up. error in else block of get_nested function. error ?

thoroughly @ code , realize when first executes (for parent_id =2),

$array[$page['parent_id']]['children'][] = $page;

it find $array[2] ($array [2] ['children'] [ ] ) doesn't exists. possible solution sort (orderby) query in ascending order of parent_id.


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