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<?php $date = new DateTimeImmutable("2022-09-28 06:30:05.011183"); $timestampMs = (int) ($date->getTimestamp() . $date->format('v')); $timestampS1000 = (int) ($date->getTimestamp() * 1000); var_dump($timestampMs); var_dump($timestampS1000); var_dump($timestampMs === $timestampS1000);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
int(1664339405011) int(1664339405000) bool(false)

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102.6 ms | 406 KiB | 5 Q