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@ 2023-01-29T08:26:06Z

<?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' => [],
    ]
];

$nat_ksort_r = function(&$data) use (&$nat_ksort_r) {
    if (is_array($data)) {
        ksort($data, SORT_NATURAL);
        foreach ($data as &$item) {
            $nat_ksort_r($item);
        }
    }
};
$nat_ksort_r($array);
var_export($array);

Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12: array ( 'fake_level' => array ( 'dir_7' => array ( 'subdir_1' => array ( 'file_5.mp4' => (object) array( 'name' => 'file_5.mp4', 'size' => 56, 'active' => true, ), 'file_19.mp4' => (object) array( 'name' => 'file_19.mp4', 'size' => 77, 'active' => false, ), 'file_33.mp4' => (object) array( 'name' => 'file_33.mp4', 'size' => 81, 'active' => true, ), ), ), 'dir_13' => array ( ), 'dir_66' => array ( ), 'dir_101' => array ( ), ), 'first_level' => array ( 'dir_1' => array ( 'subdir_1' => array ( 'file_8.mp4' => (object) array( 'name' => 'file_8.mp4', ), ), 'subdir_2' => array ( 'file_6.mp4' => (object) array( 'name' => 'file_6.mp4', ), 'file_7.mp4' => (object) array( 'name' => 'file_7.mp4', ), 'file_9.mp4' => (object) array( 'name' => 'file_9.mp4', ), 'file_17.mp4' => (object) array( 'name' => 'file_17.mp4', ), ), ), 'dir_3' => array ( 'subdir_1' => array ( 'file_1.mp4' => (object) array( 'name' => 'file_1.mp4', ), 'file_2.mp4' => (object) array( 'name' => 'file_2.mp4', ), ), ), ), )

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