Sort a multidimensional array by a column value

Question

How can I sort a 2D array in PHP. I want to sort on date, Array is in this format :

[result] => Array
        (
            [0] => Array
                (
                    [link] => http://local/node/0
                    [date] => 13158505310
                )

            [1] => Array
                (
                    [link] => http://local/node/1
                    [date] => 13158505311
                )

            [2] => Array
                (
                    [link] => http://local/node/2
                    [date] => 13158505312

Answer 1

Use this

 function sortByDateDesc($a, $b) {
   return strcmp($a["date"], $b["date"]);
 }

 function sortByDateAsc($a, $b) {

    if ($a['date'] == $b['date']) {
        return 0;
    }
    return ($a['date'] > $b['date']) ? -1 : 1;  
 }

 usort($array, 'sortByDateDesc'); //Descending order
 //usort($array, 'sortByDateAsc'); //Asceding order