php一维二维数组键排序方法总结
在php中数组排序一直是一个老生常谈的问题,下面我们来集中讲一下关于在php中一维数组与二维数组排序的实现程序,各位同学可参考.
功能:对数组进行重新排序.
说明:冒泡排序 (一维数组)(二维数组某个健排序)
两两比较待排序数据元素的大小,发现两个数据元素的次序相反时即进行交换,直到没有反序的数据元素为止
设想被排序的数组R[1..N] 垂直竖立,将每个数据元素看作有重量的气泡,从下往上扫描数组,凡扫描违反原则的轻气泡,就使其向上”漂浮”.如此反复进行.直到最后任何两个气都是轻者在上,重者在下为止.
代码如下 | 复制代码 |
/** function bubble_sort($array,$key=null) { |
array_multisort排序使用方法
array_multisort() 对二位数组按照指定键值排序的使用方法
本例中定义了一个名为 $data 的二维数组,然后对它进行排序,方法如下
代码如下 | 复制代码 |
$data[] = array('volume' => 67, 'edition' => 2);
Array |
一维数组排序我们只要使用sort()就可以了,相对应的 asort($arr); 函数,是按键值排序,且维持原有的键值关系。
同样原理,rsort(); arsort(); krsort(); 函数除了排序是按降序排列外,其它与sort(); rsort(); ksort(); 相同。

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