- var_dump: documentation ( source)
- date: documentation ( source)
- strtotime: documentation ( source)
<?php
$data = "2014-09-23 08:00:00";
$dia_inicio = date('d', strtotime($data));
$mes_inicio = (int)date('n', strtotime($data));
var_dump($data);
var_dump($mes_inicio);