- date_default_timezone_set: documentation ( source)
- date: documentation ( source)
- strtotime: documentation ( source)
<?php
date_default_timezone_set('Europe/Paris');
$ts = strtotime('tomorrow midnight') - 1;
$date = new \DateTime('tomorrow midnight');
echo date('Y-m-d H:i:s',$ts);
echo $date->format('Y-m-d H:i:s');