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<?php function quicksort($elementToFind){ $numbers = [1,2,3]; $min = 0; $max = count($numbers) - 1; while( $min <= $max){ $mid = ceil(($min + $max) / 2); $numberToTry = $numbers[$mid]; if($numberToTry === $elementToFind){ return $mid; } else if($numberToTry > $elementToFind){ $min = $mid + 1; } else { $max = $mid - 1; } } } echo quicksort(3);
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