Online PHP editor | refs for XgI6A

<?php $display = [ ['dateChanged' => '2019-09-17T19:42:56'], ['dateChanged' => '2018-09-17T19:42:56'], ['dateChanged' => '2017-09-17T19:42:56'], ['dateChanged' => '2030-09-17T19:42:56'] ]; usort($display, function($a, $b) { $ad = new DateTime($a['dateChanged']); $bd = new DateTime($b['dateChanged']); if ($ad == $bd) { return 0; } return $ad < $bd ? -1 : 1; }); print_r($display);