php - The best way to get the first and last day of last month?

Question

I'm looking for the best way to get the first and the last day of a last month. I use them for make SQL queries to get stats of last month.

I think that this is the best way, more optimized but not more comprensive, anyone have another way to do the same?

    $month_ini = date("Y-m-d", mktime(0, 0, 0, date("m", strtotime("-1 month")), 1, date("Y", strtotime("-1 month"))));

    $month_end = date("Y-m-d", mktime(0, 0, 0, date("m", strtotime("-1 month")), date("t", strtotime("-1 month")), date("Y", strtotime("-1 month"))));

Thanks!!

Answer 1

In PHP 5.3, you can use the DateTime class :

<?php

$month_ini = new DateTime("first day of last month");
$month_end = new DateTime("last day of last month");

echo $month_ini->format('Y-m-d'); // 2012-02-01
echo $month_end->format('Y-m-d'); // 2012-02-29