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<?php $dateStart = new DateTime('2017-07-11 00:00:00'); $now = new DateTime('now', $dateStart->getTimezone()); $interval = $dateStart->diff($now); print_r($interval->format('%s'));
Output for 7.2.17 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
43
Output for 7.0.0 - 7.0.31, 7.1.0 - 7.1.33, 7.2.0 - 7.2.9
44

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