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<?php $nbMonth = 3; $now = new \DateTime('2017-01-01 11:55:00'); $datePeriodStart = $now->sub(new \DateInterval('P'.$nbMonth.'M')); echo $datePeriodStart->format('Y-m-d H:i:s') . "\n"; $datePeriodStart->setDate($datePeriodStart->format('Y'), $datePeriodStart->format('n'), 1); $datePeriodStart->setTime(0,0); echo $datePeriodStart->format('Y-m-d H:i:s') . "\n"; $endDate = new DateTime('last day of previous month'); echo $endDate->format('Y-m-d H:i:s') . "\n";
Output for git.master, git.master_jit, rfc.property-hooks
2016-10-01 11:55:00 2016-10-01 00:00:00 2017-05-31 12:00:53

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