3v4l.org

run code in 300+ PHP versions simultaneously
<?php $time = strtotime(date('Y-m').'-01'); echo date('Y-m-d',$time); echo '<br>'.$final = date("Y-m-d", strtotime("-1 month", $time)); echo date('m-01-Y 00:00:00',strtotime('this month')) . '<br/>'; echo date('m-t-Y 12:59:59',strtotime('this month')) . '<br/>';
Output for 4.3.5 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
2013-08-01<br>2013-07-0108-01-2013 00:00:00<br/>08-31-2013 12:59:59<br/>
Output for 4.3.0 - 4.3.4
2013-08-01<br>2013-07-0109-01-2013 00:00:00<br/>09-30-2013 12:59:59<br/>
preferences:
241.89 ms | 401 KiB | 370 Q