Sort Multi Array in PHP

Question

Does anybody have an idea how can I sort this array by key (date) in PHP?

Array
(   
    [2011-02-16] => Array
        (
            [date] => 2011-02-16
          


        

Answer 1

What you want is UASORT.

http://us3.php.net/manual/en/function.uasort.php

function would be like:

function cmp($a, $b) {
    $d1 = strtotime($a['date']);
    $d2 = strtotime($b['date']);
    if ($d1 == $d2) {
       return 0;
    }
    return ($d1 < $d2) ? -1 : 1;
}