Online PHP editor | refs for sWY4u

<?php $array = [ 'first_level' => [ 'dir_3' => [ 'subdir_1' => [ 'file_2.mp4' => (object) [ 'name' => 'file_2.mp4' ], 'file_1.mp4' => (object) [ 'name' => 'file_1.mp4' ] ] ], 'dir_1' => [ 'subdir_2' => [ 'file_6.mp4' => (object) [ 'name' => 'file_6.mp4' ], 'file_9.mp4' => (object) [ 'name' => 'file_9.mp4' ], 'file_7.mp4' => (object) [ 'name' => 'file_7.mp4' ], 'file_17.mp4' => (object) [ 'name' => 'file_17.mp4' ], ], 'subdir_1' => [ 'file_8.mp4' => (object) [ 'name' => 'file_8.mp4' ], ] ] ], 'fake_level' => [ 'dir_7' => [ 'subdir_1' => [ 'file_5.mp4' => (object) [ 'name' => 'file_5.mp4', 'size' => 56, 'active' => true, ], 'file_19.mp4' => (object) [ 'name' => 'file_19.mp4', 'size' => 77, 'active' => false, ], 'file_33.mp4' => (object) [ 'name' => 'file_33.mp4', 'size' => 81, 'active' => true, ], ] ], 'dir_13' => [], 'dir_101' => [], 'dir_66' => [], ] ]; function nat_ksort_r(array &$data): void { if (is_array($data)) { ksort($data, SORT_NATURAL); array_walk($data, __METHOD__); } } nat_ksort_r($array); var_export($array);