在PHP中按Desc顺序排序多个数组

Question

I need to sort following array in desc order by ref_no . Eg: At location [0] there should be property with id 16 (since it's ref_no is greater) and at [1] property with id 10 .

*Please note: The size of main array is dynamic and that of Property array remains same.

Array
(
[0] => Array
    (
        [Property] => Array
            (
                [id] => 10
                [member_id] => 2
                [ref_no] => 333
             }
     )


  [1] => Array
    (
        [Property] => Array
            (
                [id] => 16
                [member_id] => 4
                [ref_no] => 509
             }
     )

 )

Answer 1

适用usort

  usort($input, function ($a, $b) {return ($a['ref_no']>$b['ref_no']);});