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<?php $start = '07:00'; //started at 7 after midnight $brake = '01:30'; //1 hour and 30 minutes of brake $brakeBits = explode(":", $brake); $finish = '15:00'; //finished at 3 afternoon $startDate = \DateTime::createFromFormat("!H:i", $start); $startDate->modify($brakeBits[0]." hour ".$brakeBits[1]." minutes"); $endDate = \DateTime::createFromFormat("!H:i", $finish); $diff = $startDate->diff($endDate); echo $diff->format("%r%H:%I");
Output for git.master, git.master_jit, rfc.property-hooks
06:30

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