(PHP 5 >= 5.3.0, PHP 7)
Adds an amount of days, months, years, hours, minutes and seconds to a DateTime object
public DateTime DateTime::add ( DateInterval $interval )
Object oriented style
Procedural style
Adds the specified DateInterval object to the specified DateTime object.
Parameters:
object
Procedural style only: A DateTime object returned by date_create(). The function modifies this object.
interval
A DateInterval object
Returns:
Returns the DateTime object for method chaining or FALSE
on failure.
Examples:
DateTime::add() example
Object oriented style
<?php $date = new DateTime('2000-01-01'); $date->add(new DateInterval('P10D')); echo $date->format('Y-m-d') . "\n"; ?>
Procedural style
<?php $date = date_create('2000-01-01'); date_add($date, date_interval_create_from_date_string('10 days')); echo date_format($date, 'Y-m-d'); ?>
The above examples will output:
2000-01-11
Further DateTime::add() examples
<?php $date = new DateTime('2000-01-01'); $date->add(new DateInterval('PT10H30S')); echo $date->format('Y-m-d H:i:s') . "\n"; $date = new DateTime('2000-01-01'); $date->add(new DateInterval('P7Y5M4DT4H3M2S')); echo $date->format('Y-m-d H:i:s') . "\n"; ?>
The above example will output:
2000-01-01 10:00:30 2007-06-05 04:03:02
Beware when adding months
<?php $date = new DateTime('2000-12-31'); $interval = new DateInterval('P1M'); $date->add($interval); echo $date->format('Y-m-d') . "\n"; $date->add($interval); echo $date->format('Y-m-d') . "\n"; ?>
The above example will output:
2001-01-31 2001-03-03
See also:
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