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<?php $dailyHours = 7.5; $baseDate = new DateTime('2017-01-01', new DateTimezone('UTC')); $endDate = clone $baseDate; for($i = 1; $i <= 30; ++$i) { $m = $i*15; $duration = new DateInterval("PT{$m}M"); $endDate->add($duration); } $totalDuration = $baseDate->diff($endDate); echo $totalDuration->format('%a days, %h hours, %i minutes'); $totalHours = $totalDuration->format('%a') * 7.5 + $totalDuration->format('%h'); $totalMinutes = $totalDuration->format('%i');
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
4 days, 20 hours, 15 minutes

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159.35 ms | 403 KiB | 184 Q