Sort mutidimensional array by values total

Question

I am trying to sort multidimensional array by values total in php.

[ c => [1=>22, 2=> 14, 3=> 55], a => [7=> 33, 2=> 19, 51=> 43, 14=> 27], ... ]

since values total of a subarray are higher than in c, it should be first in this example. I would appreciate very much help regarding this problem.

uasort($arr, function($a, $b) { return array_sum($b) - array_sum($a);}); — splash58
– splash58, Commented Nov 9, 2019 at 20:17
Perhaps this page can be helpful stackoverflow.com/questions/33720295/… — The fourth bird
– The fourth bird, Commented Nov 9, 2019 at 20:17
@splash58 i tried but it is not working, even the array keys (a,c) are not kept. — Veljko Sirovljević
– Veljko Sirovljević, Commented Nov 9, 2019 at 20:22
@Thefourthbird this function does sort properly, but array keys are not kept. — Veljko Sirovljević
– Veljko Sirovljević, Commented Nov 9, 2019 at 20:26

Rakesh Jakhar · Accepted Answer · 2019-11-10 05:01:41Z

0

You can use array_multisort with array_map

array_multisort(array_map(function($v){return array_sum($v);},$a), SORT_DESC, $a);

First argument with array_map is the sum of the all sub-array. You can change the order of the result array by modifying the 2nd argument SORT_ASC, SORT_DESC

Working example : https://3v4l.org/4fpXh

answered Nov 10, 2019 at 5:01

Rakesh Jakhar

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dWinder · Accepted Answer · 2019-11-10 18:38:16Z

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As @splash58 comment (just to make formal answer):

Use uasort() and array_sum as:

uasort($arr, function($a, $b) { return array_sum($b) - array_sum($a);});

Live example: 3v4l

edited Nov 10, 2019 at 18:38

answered Nov 9, 2019 at 20:35

dWinder

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