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<?php $date = new \DateTime('2021-11-10 00:00:00.000001', new \DateTimeZone('Europe/Rome')); // Oggetto $date2 = new \DateTime('2021-11-10 00:00:00.000006', new \DateTimeZone('Europe/Rome')); // Oggetto $result = null; //Uguale allo stesso secondo if($date->format('U') === $date2->format('U')) $result = ('0.' . ($date2)->format('u')) - ('0.' . ($date)->format('u')); else $hi = ''; //Altro codice php //Attenzione php non può usare i numeri in virgola fissa ma in virgola mobile e spesso perde precisione e anche la visualizzazione (impostazione ini precision) può modificare distorcendo il valore effettivamente memorizzato var_dump($result, $date2->modify(substr(str_replace('.', '0', sprintf('%00.6F', $result)) . '0', 0, 8) . ' usec')); echo substr(str_replace('.', '0', sprintf('%00.6F', $result)) . '0', 0, 8);
Output for git.master, git.master_jit, rfc.property-hooks
float(5.0E-6) object(DateTime)#2 (3) { ["date"]=> string(26) "2021-11-10 00:00:00.000011" ["timezone_type"]=> int(3) ["timezone"]=> string(11) "Europe/Rome" } 00000005

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