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<?php $date = new DateTime('2011-2-28'); var_dump($date->format('Y-m-d')); $date->add(new DateInterval('P1Y')); var_dump($date->format('Y-m-d')); $date2 = new DateTime('2012-2-29'); var_dump($date2->format('Y-m-d')); $date2->add(new DateInterval('P1Y')); var_dump($date2->format('Y-m-d')); $date3 = new DateTime('2013-2-28'); var_dump($date3->format('Y-m-d')); $date3->add(new DateInterval('P1Y')); var_dump($date3->format('Y-m-d'));
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
string(10) "2011-02-28" string(10) "2012-02-28" string(10) "2012-02-29" string(10) "2013-03-01" string(10) "2013-02-28" string(10) "2014-02-28"
Output for 5.2.0 - 5.2.17
string(10) "2011-02-28" Fatal error: Call to undefined method DateTime::add() in /in/spvWQ on line 6
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/spvWQ 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/spvWQ 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/spvWQ on line 3

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