Online PHP editor | refs for iJVta

@ 2015-12-30T16:52:35Z

<?php

$dates = [null, '2015-12-30', new \DateTime('now')];

foreach ($dates as &$date) {
    if ($date instanceof \DateTime) {
        $date = $date->format('Y-m-d');
    }
}

var_dump($dates);