PHPize Online / SQLize Online  /  SQLtest Online

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<?php $arr = [ 'a' => 1, 'a' => 2, 'b' => 2, 'b' => 3, 'b' => 1, ]; //$b = array_map('max', $arr); //print_r($b); $b = array_walk($arr, 'max'); print_r($b);
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