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<?php $array = [ '2' => [ 'title' => 'Flower', 'order' => 3 ], '3' => [ 'title' => 'Rock', 'order' => 1 ], '4' => [ 'title' => 'Grass', 'order' => 2 ] ]; $keys = array_keys($array); array_multisort( array_column($array, 'order'), SORT_DESC, SORT_NUMERIC, $array, $keys ); $array = array_combine($keys, $array); print_r($array);
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.14
Array ( [2] => Array ( [title] => Flower [order] => 3 ) [4] => Array ( [title] => Grass [order] => 2 ) [3] => Array ( [title] => Rock [order] => 1 ) )

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