3v4l.org

run code in 150+ php & hhvm versions
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<?php print "New Changes:\n"; $before = new DateTime('2014-10-26 01:00:00', new DateTimeZone('Europe/Moscow')); print $before->format(DateTime::ATOM)."\n"; $before->modify('+ 4 hours'); print $before->format(DateTime::ATOM)."\n"; print "Old Changes:\n"; $before = new DateTime('2011-03-27 00:50:00', new DateTimeZone('Europe/Moscow')); print $before->format(DateTime::ATOM)."\n"; $before->modify('+ 4 hours'); print $before->format(DateTime::ATOM)."\n";
based on MEPO4
Output for 5.4.34 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
New Changes: 2014-10-26T01:00:00+03:00 2014-10-26T05:00:00+03:00 Old Changes: 2011-03-27T00:50:00+03:00 2011-03-27T04:50:00+04:00
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.3.7 - 5.4.32
New Changes: 2014-10-26T01:00:00+04:00 2014-10-26T05:00:00+04:00 Old Changes: 2011-03-27T00:50:00+03:00 2011-03-27T04:50:00+04:00
Output for 5.2.0 - 5.3.6
New Changes: 2014-10-26T01:00:00+04:00 2014-10-26T05:00:00+03:00 Old Changes: 2011-03-27T00:50:00+03:00 2011-03-27T04:50:00+04:00
Output for 5.0.0 - 5.1.6
New Changes: Fatal error: Class 'DateTime' not found in /in/WO33k on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected ')', expecting '(' in /in/WO33k on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected ')', expecting '(' in /in/WO33k on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'('' in /in/WO33k on line 4
Process exited with code 255.