3v4l.org

run code in 200+ php & hhvm versions
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<?php echo strtotime('14-12-2015'); echo strtotime('today');
based on vLq4O
Output for 5.3.20 - 5.4.45, 5.6.28, 7.0.20 - 7.2.0
14500476001450134000
Output for 7.0.6
14500476001463781600
Output for 7.0.5
14500476001459634400
Output for 7.0.4
14500476001457564400
Output for 7.0.3
14500476001458255600
Output for 7.0.2
14500476001458687600
Output for 7.0.1
14500476001458774000
Output for 7.0.0
14500476001459033200
Output for 5.6.21
14500476001462140000
Output for 5.6.20
14500476001460239200
Output for 5.6.19
14500476001457391600
Output for 5.6.18
14500476001457996400
Output for 5.6.17
14500476001458428400
Output for 5.6.16
14500476001459116000
Output for 5.6.15
14500476001459202400
Output for 5.6.14
14500476001460584800
Output for 5.6.13
14500476001460671200
Output for 5.6.12
14500476001461103200
Output for 5.6.11
14500476001461448800
Output for 5.6.10
14500476001461535200
Output for 5.6.9
14500476001461708000
Output for 5.6.8
14500476001461967200
Output for 5.5.35
14500476001463954400
Output for 5.5.34
14500476001460325600
Output for 5.5.33
14500476001457478000
Output for 5.5.32
14500476001458169200
Output for 5.5.31
14500476001458514800
Output for 5.5.30
14500476001459461600
Output for 5.5.29
14500476001460844000
Output for 5.5.28
14500476001461189600
Output for 5.5.27
14500476001461276000
Output for 5.5.26
14500476001461621600
Output for 5.5.25
14500476001461880800
Output for 5.5.24
14500476001464040800