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  1. <?php
  2.  
  3. $categories = [
  4. 	[
  5. 		'name' => 'Категория 1',
  6. 		'id'   => 1,
  7. 	],
  8. 	[
  9. 		'name' => 'Категория 2',
  10. 		'id'   => 2,
  11. 	],
  12. 	[
  13. 		'name'      => 'Категория 3',
  14. 		'id'        => 3,
  15. 		'parent_id' => 1,
  16. 	],
  17. 	[
  18. 		'name'      => 'Категория 4',
  19. 		'id'        => 4,
  20. 		'parent_id' => 2,
  21. 	],
  22. 	[
  23. 		'name'      => 'Категория 5',
  24. 		'id'        => 5,
  25. 		'parent_id' => 3,
  26. 	]
  27. ];
  28.  
  29. $tmp = [];
  30. foreach( $categories as $value ) {
  31. 	if( ! isset( $value[ 'parent_id' ] ) ) {
  32. 		$tmp[ $value[ 'id' ] ]           = $value[ 'id' ];
  33. 		${'category' . $value[ 'id' ]}[] = $value;
  34. 	}
  35. 	else {
  36. 		$tmp[ $value[ 'id' ] ] = $value[ 'parent_id' ];
  37. 		$key                   = $value[ 'id' ];
  38. 		while( $key = array_search( $key, array_flip( $tmp ) ) ) {
  39. 			$index = $tmp[ $key ];
  40. 		}
  41. 		${'category' . $index}[] = $value;
  42. 	}
  43. }
  44. print_r( $category1 );
  45. print_r( $category2 );
Success #stdin #stdout 0.02s 24384KB
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Array
(
    [0] => Array
        (
            [name] => Категория 1
            [id] => 1
        )

    [1] => Array
        (
            [name] => Категория 3
            [id] => 3
            [parent_id] => 1
        )

    [2] => Array
        (
            [name] => Категория 5
            [id] => 5
            [parent_id] => 3
        )

)
Array
(
    [0] => Array
        (
            [name] => Категория 2
            [id] => 2
        )

    [1] => Array
        (
            [name] => Категория 4
            [id] => 4
            [parent_id] => 2
        )

)
https://ideone.com/Acy0kY
language:
PHP (php 7.3.5)
created:
5 years ago
visibility:
public

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