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<?php $arr = [ [ 20190529 => [ 30 => [ 17 => [ 3846 => 0, ], ], ], ], [ 20190516 => [ 31 => [ 17 => [ 512 => 0, ], ], ], ], ]; $keys = []; foreach($arr as $k => $item){ $keys[] = key($item); } array_multisort($keys, SORT_NATURAL, $arr); print_r($arr);die;
Output for 7.1.25 - 7.1.28, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Array ( [0] => Array ( [20190516] => Array ( [31] => Array ( [17] => Array ( [512] => 0 ) ) ) ) [1] => Array ( [20190529] => Array ( [30] => Array ( [17] => Array ( [3846] => 0 ) ) ) ) )
preferences:
115.05 ms | 404 KiB | 167 Q