- date: documentation ( source)
- strtotime: documentation ( source)
<?php
echo date('Y-m-d H:i:s', 1411627800).' -> '.date('Y-m-d H:i:s', strtotime('today', 1411627800));echo "\r\n";
echo date('Y-m-d H:i:s', 1412207700).' -> '.date('Y-m-d H:i:s', strtotime('today', 1412207700));