3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo date( 'Y m d h:i:s', strtotime( 'first day of this month' ) ); echo date( 'Y m d h:i:s', strtotime( 'first day of last month' ) ); echo date( 'Y m d h:i:s', strtotime( 'start of first day of this month' ) );
Output for 5.3.0 - 7.1.0
2013 09 01 06:12:372013 08 01 06:12:371970 01 01 01:00:00
Output for 5.1.0 - 5.2.17
1970 01 01 01:00:001970 01 01 01:00:001970 01 01 01:00:00
Output for 4.3.0 - 5.0.5
1970 01 01 12:59:591970 01 01 12:59:591970 01 01 12:59:59