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<?php $array = [ 'John', 'Brian', 'Julia', 'Adam', 'Brian', 'Jonathan', 'Amanda', 'Julia', 'Nathan' ]; $order = []; foreach ($array as $i => $v) { $lookup[$v] ??= $i; $order[] = $lookup[$v]; } array_multisort($order, $array); var_export($array);

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