- var_dump: documentation ( source)
- time: documentation ( source)
- date: documentation ( source)
- strtotime: documentation ( source)
<?php
$date_start = date('Y-m-d', strtotime('+1 day', time()));
$date_end = date('Y-m-d', strtotime('+3 day'.$date_start));
var_dump($date_start, $date_end);