Online PHP editor | refs for CcHA0

<?php $array = [ 503 => [ 'scores' => [ 4573 => ['answer' => 100], 4574 => ['answer' => 60], 4575 => ['answer' => 100], 4576 => ['answer' => 80], 4577 => ['answer' => 40], 4578 => ['answer' => 20], 4579 => ['answer' => 60], 4580 => ['answer' => 100], 4581 => ['answer' => 60], 4582 => ['answer' => 60], 4583 => ['answer' => 80], 4584 => ['answer' => 80], ], 'category' => 'Category A', 'grade' => 70, 'color' => NULL ], 504 => [ 'scores' => [ 4585 => ['answer' => 40], 4586 => ['answer' => 100], 4587 => ['answer' => 80], 4588 => ['answer' => 60], 4589 => ['answer' => 100], 4590 => ['answer' => 40], 4591 => ['answer' => 80], 4592 => ['answer' => 60], 4593 => ['answer' => 60], 4594 => ['answer' => 100], 4595 => ['answer' => 100], 4596 => ['answer' => 80], ], 'category' => 'Category B', 'grade' => 75, 'color' => NULL ], 505 => [ 'scores' => [ 4597 =>['answer' => 20], 4598 =>['answer' => 80], 4599 =>['answer' => 100], 4600 =>['answer' => 60], 4601 =>['answer' => 20], 4602 =>['answer' => 20], 4603 =>['answer' => 100], 4604 =>['answer' => 40], 4605 =>['answer' => 60], 4606 =>['answer' => 100], 4607 =>['answer' => 80], 4608 =>['answer' => 20], ], 'category' => 'Category C', 'grade' => 58.3, 'color' => NULL, ] ]; foreach ($array as ['scores' => &$scores]) { arsort($scores); } var_export($array);