数组快速排序使用方法如下：

 $asd=array(23,1,21,4,19,89,200,1,78,3,4,7,1,0,88);
        $obj=new zqf();
        $quick= $obj->quicksort($asd);
        print_r($quick);Array ( [0] => 0 [1] => 1 [2] => 1 [3] => 1 [4] => 3 [5] => 4 [6] => 4 [7] => 7 [8] => 19 [9] => 21 [10] => 23 [11] => 78 [12] => 88 [13] => 89 [14] => 200 )