Online PHP editor | refs for AJcgL

@ 2016-04-19T16:39:34Z

<?php

$start = new DateTimeImmutable('2016-04-20 00:37:15');
$end = $start->modify('+7 days');
$diff = $end->diff($start);

echo $diff->format('%d days') . PHP_EOL;

var_dump($start, $end, $diff);