3v4l.org

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<?php $now = strtotime('6/17/2016 20:10 CEST'); echo date("m/d/y", strtotime("+1.5 years", $now)), PHP_EOL; echo date("m/d/y", strtotime("+1.0 years", $now));
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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
06/17/21 06/17/16

preferences:
256.24 ms | 404 KiB | 330 Q