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run code in 150+ php & hhvm versions
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<?php $d1 = '2014-10-26 01:59:59'; $d2 = '2014-10-26 02:00:00'; var_dump ((new DateTime($d2))->sub(new DateTime($d1)));
based on cFGrc
Output for 5.4.0 - 5.6.28, 7.0.0 - 7.1.0
Warning: DateTime::sub() expects parameter 1 to be DateInterval, object given in /in/WWepO on line 5 bool(false)
Output for hhvm-3.12.0

Process exited with code 139.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected T_OBJECT_OPERATOR in /in/WWepO on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_OBJECT_OPERATOR in /in/WWepO on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/WWepO on line 5
Process exited with code 255.