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<?php $hour1 = '12:00:00'; $hour2 = '09:00:00'; $o1 = new DateTime($hour1); $o2 = new DateTime($hour2); $diff = $o1->diff($o2,true); // to make the difference to be always positive. echo $diff->format('%H:%I:%S');
Output for git.master_jit, git.master, rfc.property-hooks
03:00:00

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