datetimeimmutable.diff(3) [php man page]

DATETIMEIMMUTABLE.DIFF(3)						 1						 DATETIMEIMMUTABLE.DIFF(3)

DateTime::diff - Returns the difference between two DateTime objects

       Object oriented style

SYNOPSIS

       public DateInterval DateTime::diff (DateTimeInterface  $datetime2, [bool  $absolute = false])

DESCRIPTION

       DateInterval DateTimeImmutable::diff (DateTimeInterface	$datetime2, [bool  $absolute = false]) DateInterval DateTimeInterface::diff (Date-
       TimeInterface  $datetime2, [bool  $absolute = false])

       Procedural style
       DateInterval date_diff (DateTimeInterface  $datetime1, DateTimeInterface  $datetime2, [bool  $absolute = false])

	Returns the difference between two DateTimeInterface objects.

PARAMETERS

	      o $datetime
		- The date to compare to.

	      o $absolute
		- Should the interval be forced to be positive?

RETURN VALUES

	The DateInterval object representing the difference between the two dates or FALSE on failure.

EXAMPLES

       Example #1

	      DateTimeImmutable.diff(3) example

	      Object oriented style

	      <?php
	      $datetime1 = new DateTime('2009-10-11');
	      $datetime2 = new DateTime('2009-10-13');
	      $interval = $datetime1->diff($datetime2);
	      echo $interval->format('%R%a days');
	      ?>

	      Procedural style

	      <?php
	      $datetime1 = date_create('2009-10-11');
	      $datetime2 = date_create('2009-10-13');
	      $interval = date_diff($datetime1, $datetime2);
	      echo $interval->format('%R%a days');
	      ?>

	      The above examples will output:

	      +2 days

       Example #2

	      DateTime object comparison

	      Note

		      As of PHP 5.2.2, DateTime objects can be compared using comparison operators.

	      <?php
	      $date1 = new DateTime("now");
	      $date2 = new DateTime("tomorrow");

	      var_dump($date1 == $date2);
	      var_dump($date1 < $date2);
	      var_dump($date1 > $date2);
	      ?>

	      The above example will output:

	      bool(false)
	      bool(true)
	      bool(false)

SEE ALSO 
DateInterval.format(3), DateTime.add(3), DateTime.sub(3).
PHP Documentation Group 												 DATETIMEIMMUTABLE.DIFF(3)

DATETIME.SUB(3) 							 1							   DATETIME.SUB(3)

DateTime::sub - Subtracts an amount of days, months, years, hours, minutes and seconds from a DateTime object

       Object oriented style

SYNOPSIS

       public DateTime DateTime::sub (DateInterval  $interval)

DESCRIPTION

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

	Subtracts the specified DateInterval object from 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.sub(3) example

	      Object oriented style

	      <?php
	      $date = new DateTime('2000-01-20');
	      $date->sub(new DateInterval('P10D'));
	      echo $date->format('Y-m-d') . "
";
	      ?>

	      Procedural style

	      <?php
	      $date = date_create('2000-01-20');
	      date_sub($date, date_interval_create_from_date_string('10 days'));
	      echo date_format($date, 'Y-m-d');
	      ?>

	      The above examples will output:

	      2000-01-10

       Example #2

	      Further DateTime.sub(3) examples

	      <?php
	      $date = new DateTime('2000-01-20');
	      $date->sub(new DateInterval('PT10H30S'));
	      echo $date->format('Y-m-d H:i:s') . "
";

	      $date = new DateTime('2000-01-20');
	      $date->sub(new DateInterval('P7Y5M4DT4H3M2S'));
	      echo $date->format('Y-m-d H:i:s') . "
";
	      ?>

	      The above example will output:

	      2000-01-19 13:59:30
	      1992-08-15 19:56:58

       Example #3

	      Beware when subtracting months

	      <?php
	      $date = new DateTime('2001-04-30');
	      $interval = new DateInterval('P1M');

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

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

	      The above example will output:

	      2001-03-30
	      2001-03-02

NOTES

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

SEE ALSO 
DateTime.add(3), DateTime.diff(3), DateTime.modify(3).
PHP Documentation Group 													   DATETIME.SUB(3)