php二维数组按某个键值排序的实例讲解
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排序前
- Array
- (
- [0] => Array
- (
- [name] => 龙
- [age] => 2017-02-28
- )
- [1] => Array
- (
- [name] => 龙2
- [age] => 2017-03-14
- )
- [2] => Array
- (
- [name] => 小3
- [age] => 2017-05-09
- )
- [3] => Array
- (
- [name] => 龙4
- [age] => 2017-02-03
- )
- [4] => Array
- (
- [name] => 龙5
- [age] => 2017-03-23
- )
- [5] => Array
- (
- [name] => 龙6
- [age] => 21
- )
- )
- array_multisort(array_column($arr,'age'),SORT_DESC,$arr);
- print_r($arr);
排序后
- Array
- (
- [0] => Array
- (
- [name] => 龙6
- [age] => 21
- )
- [1] => Array
- (
- [name] => 小3
- [age] => 2017-05-09
- )
- [2] => Array
- (
- [name] => 龙5
- [age] => 2017-03-23
- )
- [3] => Array
- (
- [name] => 龙2
- [age] => 2017-03-14
- )
- [4] => Array
- (
- [name] => 龙
- [age] => 2017-02-28
- )
- [5] => Array
- (
- [name] => 龙4
- [age] => 2017-02-03
- )
- )
其中 array_column(数组,数组中的某个键值) 从多维数组中取出某个键值的一列 返回一个一维数组;
array_multisort(数组(一维数组),排序方式(SOTR_ASC,SOTR_DESC),其他数组(可以是二维的))。