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<?php $a = new DateTimeImmutable('-3 days'); $b = new DateTimeImmutable('now'); var_dump($a->format('Y-m-d H:i:s')); var_dump($b->format('Y-m-d H:i:s'));
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.4, 7.1.6 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
string(19) "2015-11-15 11:44:46" string(19) "2015-11-18 11:44:46"
Output for 7.3.32 - 7.3.33, 8.0.13
string(19) "2015-11-15 10:44:46" string(19) "2015-11-18 10:44:46"
Output for 7.1.5
string(19) "2015-11-15 11:44:47" string(19) "2015-11-18 11:44:47"

preferences:
255.39 ms | 401 KiB | 323 Q