- date: documentation ( source)
- strtotime: documentation ( source)
<?php
function getLastDay($mes = null, $ano = null) {
$mes = is_null($mes) ? date('m') : $mes;
$ano = is_null($ano) ? date('Y') : $ano;
$data = $ano . '-' . $mes . '-' . '01';
return date('t', strtotime($data));
}
echo getLastDay(02, 2012);