- date: documentation ( source)
- strtotime: documentation ( source)
<?php
$month = 10;
$monthName = date('M', strtotime('2012-'.$month.'-01'));
echo $monthName."\r\n";
echo date('d.m.Y H:i:s', strtotime('first day of '.$monthName))."\r\n";
echo date('d.m.Y H:i:s', strtotime('last day of '.$monthName.', 23:59:59'))."\r\n";