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<?php date_default_timezone_set('Europe/Zurich'); $now = time(); $timeHourFraction = strtotime("+0.4 days"); // ~ +1 hour $timePlus1Hour = strtotime("+1 hour"); // reference echo "now: " . date("d.m.Y H:i:s", $now) . PHP_EOL; echo "+0.0416666667d: " . date("d.m.Y H:i:s", $timeHourFraction) . PHP_EOL; echo "+1 hour: " . date("d.m.Y H:i:s", $timePlus1Hour) . PHP_EOL; echo PHP_EOL; echo "diff (+0.0416666667d - now) seconds: " . ($timeHourFraction - $now) . PHP_EOL; echo "diff (+1 hour - now) seconds: " . ($timePlus1Hour - $now) . PHP_EOL; echo "delta between both seconds: " . ($timeHourFraction - $timePlus1Hour) . PHP_EOL; echo PHP_EOL . "equal? "; var_dump($timeHourFraction === $timePlus1Hour);

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40.71 ms | 408 KiB | 5 Q