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<?php $date = new DateTime(); echo $date->format('Y-m-d'); $date->add('P1M'); echo $date->format('Y-m-d');
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
2014-03-10 Fatal error: Uncaught TypeError: DateTime::add(): Argument #1 ($interval) must be of type DateInterval, string given in /in/Gt3cD:5 Stack trace: #0 /in/Gt3cD(5): DateTime->add('P1M') #1 {main} thrown in /in/Gt3cD on line 5
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
2014-03-10 Warning: DateTime::add() expects parameter 1 to be DateInterval, string given in /in/Gt3cD on line 5 2014-03-10
Output for 5.2.0 - 5.2.17
2014-03-10 Fatal error: Call to undefined method DateTime::add() in /in/Gt3cD on line 5
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Fatal error: Class 'DateTime' not found in /in/Gt3cD on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
Fatal error: Cannot instantiate non-existent class: datetime in /in/Gt3cD on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Cannot instantiate non-existent class: datetime in /in/Gt3cD on line 3

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