php get end date of month

1<?php
2
3$query_date = '2010-02-04';
4
5// First day of the month.
6echo date('Y-m-01', strtotime($query_date));
7
8// Last day of the month.
9echo date('Y-m-t', strtotime($query_date));

1$a_date = "2009-11-23";
2echo date("Y-m-t", strtotime($a_date));

1// First date of the month.
2$monthFirstDate = date('Y-m-01', strtotime('today'));
3
4// Last date of the month.
5$monthLastDate = date('Y-m-t', strtotime('today'));
6
7// Second last date of the month
8$monthLastSecondDate = date('Y-m-d', strtotime('-2 day', strtotime('today')));