How arrange this array in ascending order by date?

Question

this is my array

[comment] => Array
        (
            [0] => Array
                (
                    [mem_id] => 51
                    [comment] => nice...
                    [profilenam] => xyz
                    [photo_thumb] => photos/81951b37ad01c4aa65662956f178214eth.jpeg
                    [date] => 1307975661
                )

            [1] => Array
                (
                    [mem_id] => 329
                    [comment] => nice...
                    [profilenam] => abc
                    [photo_thumb] => photos/f841eab12f5a24ce12b984904760c05fth.jpeg
                    [date] => 1308043486
                )

        )

actually i wanted to arrange in ascending order by date , i used asort() but didn't work

You're going to need `usort()` for that: http://www.php.net/manual/en/function.usort.php — PeeHaa, Jun 14 '11 at 15:38
Seems like the comments are coming from the DB, why not sure 'ORDER BY date ASC' in the query getting these results? — Sabeen Malik, Jun 14 '11 at 15:39
possible duplicate of [PHP sort multidimensional array by value](http://stackoverflow.com/questions/2699086/php-sort-multidimensional-array-by-value) — Gordon, Jun 14 '11 at 15:41
@Sabeen: Out of curiosity, what makes you think these are coming from a database? — Evert, Jun 14 '11 at 15:42
possible duplicate of [PHP Sort a multidimensional array by element containing date](http://stackoverflow.com/questions/2910611/php-sort-a-multidimensional-array-by-element-containing-date) — Ferdinand Beyer, Jun 14 '11 at 15:42
http://stackoverflow.com/search?q=sort+multidimensional+array+php — Gordon, Jun 14 '11 at 15:42
@Sabeen Malik, thanks man i wasted 2-2:30 hrs to arrange this array using many way thanks a lot — RockDance, Jun 14 '11 at 15:43
@Evert the hunch is mainly based on the way the array looks like. The ids and the date in the unix timestamp format suggests the same too. So just a suggestion in case that was the case :) — Sabeen Malik, Jun 14 '11 at 15:44

phihag · Answer 1 · 2011-06-14T16:36:04.380

5

usort($ar['comment'], function($v1, $v2) {
    return $v1['date'] - $v2['date'];
});

In php<5.3, use create_function instead of the anonymous function notation.

edited Jun 14 '11 at 16:36

answered Jun 14 '11 at 15:40

phihag

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Instead of the `if`s, you could simply write `return $v1['date'] - $v2['date'];`. ;) – Ferdinand Beyer Jun 14 '11 at 15:52

score 1 · Answer 2 · answered Jun 14 '11 at 15:41

1

You are sorting array of array, in this case none of the built-in sort function with built-in comparison function would work. Try usort or uasort instead.

answered Jun 14 '11 at 15:41

LeleDumbo

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Karolis · Answer 3 · 2011-06-14T15:52:24.590

0

I haven't tested, but something like this:

uasort($comment, function ($a, $b) { return $a['date'] - $b['date']; } );

edited Jun 14 '11 at 15:52

answered Jun 14 '11 at 15:46

Karolis

9,396
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38

How arrange this array in ascending order by date?

3 Answers3