3v4l.org

run code in 200+ php & hhvm versions
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<?php echo date('Y-m-d', strtotime(date('2013-02-28').' + 0 month')); echo ' '; echo date('Y-m-d', strtotime(date('2013-02-28').' + 1 month')); echo ' '; echo date('Y-m-d', strtotime(date('2013-02-28').' + 2 month'));
Output for 4.3.0 - 5.0.5, 5.1.2 - 7.2.0
2013-02-28 2013-03-28 2013-04-28
Output for 5.1.0 - 5.1.1
1970-01-01 1970-01-01 1970-01-01