DateTime::add

date_add

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

Object-oriented style

public DateTime DateTime::add(DateInterval $interval)

Procedural style

DateTime date_add(DateTime $object, DateInterval $interval)

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.

object: Procedural style only: A DateTime object returned by date_create. The function modifies this object.
interval: A DateInterval object

Returns the modified DateTime object for method chaining.