1. PHP 代码如下: <?php $unsorted = array(2,4,5,63,4,5,63,2,4,43); function quicksort($array) { if (count($array) == 0) return array(); $pivot = $array[0]; $left = $right = array(); for ($i = 1; $i < count($array); $i++) { if ($array[$i] < $pivot) $left[] = $array[$i]; else $right[] = $array[$i