- date_create: documentation ( source)
- date_format: documentation ( source)
- date_modify: documentation ( source)
<?php
$date_from = $date_to = date_create();
$date_from = date_modify($date_from, '+1 week');
$date_to = date_modify($date_to, '+5 weeks');
echo date_format($date_from, 'd.m.Y');