- date_add: documentation ( source)
- date_create: documentation ( source)
- date_interval_create_from_date_string: documentation ( source)
- date: documentation ( source)
- strtotime: documentation ( source)
- date_format: documentation ( source)
<?php
$sdate = date('Y-m-d', strtotime('04/05/2014'));
$date = date_create($sdate);
date_add($date, date_interval_create_from_date_string('1 days'));
echo date_format($date, 'Y-m-d');