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<?php $start = DateTime::createFromFormat('Y-m-d H:i:s', '2019-01-01 07:00:00'); $end = DateTime::createFromFormat('Y-m-d H:i:s', '2019-01-01 10:00:00'); var_dump($start->diff($end)->h); $start = DateTime::createFromFormat('Y-m-d H:i:s', '2018-01-01 07:00:00'); $end = DateTime::createFromFormat('Y-m-d H:i:s', '2019-01-01 10:00:00'); var_dump($start->diff($end)->h);
Output for git.master, git.master_jit, rfc.property-hooks
int(3) int(3)

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