date_diff(3) [php man page]

DATE_DIFF(3)								 1							      DATE_DIFF(3)

date_diff - Alias of DateTime::diff

	This function is an alias of: DateTime::diff

PHP Documentation Group 													      DATE_DIFF(3)

DATETIME.ADD(3) 							 1							   DATETIME.ADD(3)

DateTime::add - Adds an amount of days, months, years, hours, minutes and seconds to a DateTime object

       Object oriented style

SYNOPSIS

       public DateTime DateTime::add (DateInterval  $interval)

DESCRIPTION

       Procedural style
       DateTime date_add (DateTime  $object, DateInterval  $interval)

	Adds the specified DateInterval object to the specified DateTime object.

PARAMETERS

	      o $object
		-Procedural style only: A DateTime object returned by date_create(3). The function modifies this object.

	      o $interval
		- A DateInterval object

RETURN VALUES

	Returns the DateTime object for method chaining or FALSE on failure.

EXAMPLES

       Example #1

	      DateTime.add(3) example

	      Object oriented style

	      <?php
	      $date = new DateTime('2000-01-01');
	      $date->add(new DateInterval('P10D'));
	      echo $date->format('Y-m-d') . "
";
	      ?>

	      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

       Example #2

	      Further DateTime.add(3) examples

	      <?php
	      $date = new DateTime('2000-01-01');
	      $date->add(new DateInterval('PT10H30S'));
	      echo $date->format('Y-m-d H:i:s') . "
";

	      $date = new DateTime('2000-01-01');
	      $date->add(new DateInterval('P7Y5M4DT4H3M2S'));
	      echo $date->format('Y-m-d H:i:s') . "
";
	      ?>

	      The above example will output:

	      2000-01-01 10:00:30
	      2007-06-05 04:03:02

       Example #3

	      Beware when adding months

	      <?php
	      $date = new DateTime('2000-12-31');
	      $interval = new DateInterval('P1M');

	      $date->add($interval);
	      echo $date->format('Y-m-d') . "
";

	      $date->add($interval);
	      echo $date->format('Y-m-d') . "
";
	      ?>

	      The above example will output:

	      2001-01-31
	      2001-03-03

NOTES

       DateTime.modify(3) is an alternative when using PHP 5.2.

SEE ALSO 
DateTime.sub(3), DateTime.diff(3), DateTime.modify(3).
PHP Documentation Group 													   DATETIME.ADD(3)