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<?php $order = [7, 2, 1, 4]; $array = [ 1 => "O", 2 => "T", 4 => "F", 7 => "S" ]; uksort($array, static function (int $key1, int $key2) use ($order): int { return array_search($key1, $order, true) <=> array_search($key2, $order, true); }); print_r($array);
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
Array ( [7] => S [2] => T [1] => O [4] => F )

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