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run code in 200+ php & hhvm versions
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<?php $birthdate = new DateTime('1969-01-26'); $today = new DateTime(); $interval = $today->diff($birthdate); echo $interval->format('%y years');
based on dcVtK
Output for 5.3.22 - 5.4.45, 5.6.28, 7.0.20 - 7.2.0
46 years
Output for 5.5.24 - 5.6.21, 7.0.0 - 7.0.6
47 years