// <7.1
$date = new DateTimeImmutable(‘now’);
$date->format(‘u’); // 00000
// 7.1+
$date = new DateTimeImmutable(‘now’);
$date->format(‘u’); // actual microsecond info
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$date = $date->setTimezone('Europe/Rome');
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// Magic
$date = new DateTimeImmutable('now');
$date = $date->modify('first day of next month');
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“now + 5 hours”
“first day of next month”
"first weekday”
…