PHP Conference Japan 2024

DateTime::add

date_add

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

DateTime::add -- date_add Modifies a DateTime object, with added amount of days, months, years, hours, minutes and seconds

Description

Object-oriented style

public DateTime::add(DateInterval $interval): DateTime

Procedural style

date_add(DateTime $object, DateInterval $interval): DateTime

Adds the specified DateInterval object to the specified DateTime object.

Like DateTimeImmutable::add() but works with DateTime.

The procedural version takes the DateTime object as its first argument.

Parameters

object

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

interval

A DateInterval object

Return Values

Returns the modified DateTime object for method chaining.

See Also

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User Contributed Notes 1 note

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tatarynowicz at gmail dot com
23 days ago
Depending on what your use case is, adding months might or might not give you the correct result.

// Prints "2024-03-02" instead of "2024-02-29"
print Date::fromString('2024-01-31T10:00:00')
->add(new DateInterval('P1M0D')
->format('Y-m-d');
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