- date: documentation ( source)
- strtotime: documentation ( source)
<?php
$frtn = strtotime('2015-04-29'.' + 14 days');
echo date('Y-m-d', $frtn);
$today = date("Y-m-d");
$data_w = date("Y-m-d", (strtotime($today) + (60 * 60 * 24 * 14)));
echo ' | '.$data_w;