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DateTimeImmutable::modifyCreates a new object with modified timestamp


public DateTimeImmutable::modify ( string $modifier ) : DateTimeImmutable

Creates a new DateTimeImmutable object with modified timestamp. The original object is not modified.



Procedural style only: A DateTime object returned by date_create(). The function modifies this object.


A date/time string. Valid formats are explained in Date and Time Formats.

Return Values

Returns the newly created object or FALSE on failure.

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User Contributed Notes 1 note

dmytro dot sokil at gmail dot com
2 years ago
To modify milliseconds and microseconds use next formats:

= new \DateTimeImmutable('2018-01-01 00:00:00.000');
$b = $a->modify('9 msec');
var_dump($b->format('Y-m-d H:i:s.u'));

Returns string(26) "2018-01-01 00:00:00.009000"

= new \DateTimeImmutable('2018-01-01 00:00:00.000');
$b = $a->modify('9 usec');
var_dump($b->format('Y-m-d H:i:s.u'));

Returns "2018-01-01 00:00:00.000009"
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