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浅谈php冒泡排序

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Release: 2016-06-06 20:15:05
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这篇文章主要介绍了浅谈php冒泡排序,需要的朋友可以参考下

PHP实现的代码先奉上:

复制代码 代码如下:


function bubble_sort($array) {
    for ($i = 0; $i         for ($j = 0; $j             if ($array[$j] > $array[$j + 1]) {    //按升序排序
                $temp = $array[$j];
                $array[$j] = $array[$j + 1];
                $array[$j + 1] = $temp;
            }
        }
    }
    return $array;
}

$a = array(5, 1, 4, 7);

代码执行过程:

复制代码 代码如下:


i = 0;
  j = 0;
  if($arr[0] > $arr[1]) => 5 > 1 条件成立,,交换位置,形成新的数组 =>  1 5 4 7  j++
  if($arr[1] > $arr[2]) => 5 > 4 条件成立,交换位置, 形成新的数组 =>  1 4 5 7  j++
  if($arr[2] > $arr[3]) => 5 > 7 条件不成立 ,数组保持不变 , 1 4 5 7 j++ j=3 退出内层循环, i++

依次类推吧。

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