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<?php $start = new DateTime('2014-01-07', new DateTimeZone('UTC')); $end = clone $start; $start->sub(new DateInterval('P1M')); print_r($end->diff($start)); print_r($start->diff($end));
Output for git.master, git.master_jit, rfc.property-hooks
DateInterval Object ( [y] => 0 [m] => 1 [d] => 0 [h] => 0 [i] => 0 [s] => 0 [f] => 0 [invert] => 1 [days] => 31 [from_string] => ) DateInterval Object ( [y] => 0 [m] => 1 [d] => 0 [h] => 0 [i] => 0 [s] => 0 [f] => 0 [invert] => 0 [days] => 31 [from_string] => )

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