如何将PHP二维数组根据特定键值进行排序？

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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])

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))

总结

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