Sort array of objects by date field

Question

How can I re-arrange a array of objects like this:

 [495] => stdClass Object         (          [date] => 2009-10-31 18:24:09          ...         )  [582] => stdClass Object         (          [date] => 2010-2-11 12:01:42          ...         )  ... 

by the date key, oldest first ?

Answer 1

usort($array, function($a, $b) {     return strtotime($a['date']) - strtotime($b['date']); }); 

Or if you don't have PHP 5.3:

function cb($a, $b) {     return strtotime($a['date']) - strtotime($b['date']); } usort($array, 'cb');