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<?php $array = ['first', 'luke', 'last', 'lancaster']; $odd=array_filter($array, function ($input) {return $input & 1;}); $even=array_filter($array, function ($input) {return !($input & 1);}); $combined = array_combine($odd, $even); var_dump($combined);

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64.4 ms | 402 KiB | 5 Q