3v4l.org

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<?php echo date( 'Y m d h:i:s', strtotime( 'first day of this month' ) ) . "\n"; echo date( 'Y m d h:i:s', strtotime( 'first day of last month' ) ) . "\n"; echo date( 'Y m d h:i:s', strtotime( 'start of first day of this month' ) ) . "\n";
Output for 5.3.0 - 5.3.9, 5.3.11 - 5.3.29, 5.4.0 - 5.4.45, 5.5.1 - 5.5.16, 5.5.18 - 5.5.29, 5.5.31 - 5.5.38, 5.6.0 - 5.6.31, 5.6.33 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
2013 09 01 06:12:56 2013 08 01 06:12:56 1970 01 01 01:00:00
Output for 7.3.32 - 7.3.33, 7.4.26, 8.0.13
2013 09 01 04:12:56 2013 08 01 04:12:56 1970 01 01 12:00:00
Output for 5.5.17, 5.5.30, 5.6.32
2013 09 01 06:12:57 2013 08 01 06:12:57 1970 01 01 01:00:00
Output for 5.3.10, 5.5.0
2013 09 01 06:12:55 2013 08 01 06:12:55 1970 01 01 01:00:00
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
1970 01 01 01:00:00 1970 01 01 01:00:00 1970 01 01 01:00:00
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5
1970 01 01 12:59:59 1970 01 01 12:59:59 1970 01 01 12:59:59
preferences:
260.98 ms | 402 KiB | 424 Q