Algorithmic ideas and code for quick sorting in PHP

The content of this article is about the algorithm ideas and code for implementing quick sorting in PHP. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Core idea: Divide it into two parts according to size, sort them recursively, and look forward and backward (split function).

php code is as follows:

=$pivotkey){ $high--; } $arr=swap($arr,$low,$high);//将比枢轴记录小的记录交换到低端 while ($low$low,"resultArr"=>$arr);//返回枢轴所在位置 } function swap($arr,$index1,$index2){ $pivotkey=$arr[$index1]; $arr[$index1]=$arr[$index2]; $arr[$index2]=$pivotkey; return $arr; } $arr=array(9,1,3,2,6,7,4,8); $resultArr=quickSort($arr); echo implode(',',$resultArr);

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