3v4l.org

run code in 200+ php & hhvm versions
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<?php echo strtotime('14-12-2015').'<br/>'; echo strtotime('today');
based on cok7r
Output for 5.3.20 - 5.4.45, 5.6.28, 7.0.20 - 7.2.0
1450047600<br/>1450134000
Output for 7.0.6
1450047600<br/>1463781600
Output for 7.0.5
1450047600<br/>1459634400
Output for 7.0.4
1450047600<br/>1457564400
Output for 7.0.3
1450047600<br/>1458255600
Output for 7.0.2
1450047600<br/>1458687600
Output for 7.0.1
1450047600<br/>1458774000
Output for 7.0.0
1450047600<br/>1459033200
Output for 5.6.21
1450047600<br/>1462140000
Output for 5.6.20
1450047600<br/>1460239200
Output for 5.6.19
1450047600<br/>1457391600
Output for 5.6.18
1450047600<br/>1457996400
Output for 5.6.17
1450047600<br/>1458428400
Output for 5.6.16
1450047600<br/>1459116000
Output for 5.6.15
1450047600<br/>1459202400
Output for 5.6.14
1450047600<br/>1460584800
Output for 5.6.13
1450047600<br/>1460671200
Output for 5.6.12
1450047600<br/>1461103200
Output for 5.6.11
1450047600<br/>1461448800
Output for 5.6.10
1450047600<br/>1461535200
Output for 5.6.9
1450047600<br/>1461708000
Output for 5.6.8
1450047600<br/>1461967200
Output for 5.5.35
1450047600<br/>1463954400
Output for 5.5.34
1450047600<br/>1460325600
Output for 5.5.33
1450047600<br/>1457478000
Output for 5.5.32
1450047600<br/>1458169200
Output for 5.5.31
1450047600<br/>1458514800
Output for 5.5.30
1450047600<br/>1459461600
Output for 5.5.29
1450047600<br/>1460844000
Output for 5.5.28
1450047600<br/>1461189600
Output for 5.5.27
1450047600<br/>1461276000
Output for 5.5.26
1450047600<br/>1461621600
Output for 5.5.25
1450047600<br/>1461880800
Output for 5.5.24
1450047600<br/>1464040800