Sort Multidimensional array by two variables - PHP

Question

I need to sort my array php by a key value. my array:

Array
(
    [1430039342393636453] => Array
        (
            [0] => Array
                (
                    [thrid] => 1430039342393636453
                    [uid] => 19748
                    [flag] => 1
                    [timestamp] => 1363791789
                    [date] => Mar 20
                    [content_preview] => 
                    [content] => 

                )

        )
[1430750471744336569] => Array
        (
            [0] => Array
                (
                    [thrid] => 1430750471744336569
                    [uid] => 19870
                    [flag] => 1
                    [timestamp] => 1364469959
                    [date] => Mar 28
                    [content_preview] =>
                    [content] =>
                )

            [1] => Array
                (
                    [thrid] => 1430750471744336569
                    [uid] => 19874
                    [flag] => 1
                    [timestamp] => 1364472417
                    [date] => Mar 28
                    [content_preview] => 
                    [content] => 
                )
)

I need to sort by timestamp the main array and also the childs arrays. Any suggesitons?

Have you tried to look up "sort php". php.net/manual/en/array.sorting.php — Daniel
– Daniel, Commented Apr 4, 2013 at 15:00

Community · Accepted Answer · 2017-05-23 12:29:17Z

1

Use asort to sort associative arrays.

Related S.O. Post:

Sorting an associative array in PHP

edited May 23, 2017 at 12:29

CommunityBot

11 silver badge

answered Apr 4, 2013 at 15:01

Jordan

3,0222 gold badges23 silver badges29 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

DavidScherer · Accepted Answer · 2013-04-04 15:10:18Z

0

Try something like:

private function sort($sort) {

    foreach($sort as &$arr) { //use a reference because usort uses references to manipulate your array.
                            //if you don't pass by reference you'll never see the sort
        usort($arr, function($a, $b) { return $a['timestamp'] - $b['timestamp'];
    }

    usort($sort, function($a, $b) { return key($a) - key($b); }

    return $sort;

}

answered Apr 4, 2013 at 15:10

DavidScherer

9012 gold badges15 silver badges27 bronze badges

5 Comments

Ste Over a year ago

Thx, but this is wrong usort($sort, function($a, $b) { return key($b) - key($a); }); - I need to sort $sort by timestamp not by key!

DavidScherer Over a year ago

You said you needed to sort by timestamp in the "main array" and "child arrays" which I took to mean the array containing the 2 child-arrays as being the "main" and the two children as "child" where the "main" array has only 2 elements, each arrays, with timestamps as their keys. I assumed you wanted the parent sorted by the timestamp key and the children by the timestamp value. The code above will sort your array. It's up to you to adapt generic and/or pseudo code from S.O. to meet your specific need. usort().

DavidScherer Over a year ago

Actually, if you want to keep your keys, you'll need to use asort() as @Jordan suggested. I'll update my example.

DavidScherer Over a year ago

Actually, you should use usort(), you'll just need to modify your array format to protect your keys.

DavidScherer Over a year ago

You'll want to put anything with an index you want to protect in a sub array, so that PHP changes the index of the new parrent and your old index is left alone and accessable..

Collectives™ on Stack Overflow

Sort Multidimensional array by two variables - PHP

2 Answers 2

Comments

5 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

5 Comments

Your Answer

Sign up or log in

Post as a guest

Related