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# DateTime::sub

(PHP 5 >= 5.3.0)

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

### Opis

Styl obiektowy

public DateTime DateTime::sub ( DateInterval `$interval` )

Styl proceduralny

DateTime date_sub ( DateTime `$object` , DateInterval `$interval` )

Subtracts the specified DateInterval object from the specified DateTime object.

### Parametry

`object`

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

`interval`

  A DateInterval object

### Zwracane wartości

Returns the modified DateTime object lub `FALSE` w przypadku błędu.

### Przykłady

Przykład #1 DateTime::sub() example

Styl obiektowy

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

Styl proceduralny

`<?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');
?>`

Powyższe przykłady wyświetlą:

    2000-01-10

Przykład #2 Further DateTime::sub() examples

`<?php
$date = new DateTime('2000-01-20');
$date->sub(new DateInterval('PT10H30S'));
echo $date->format('Y-m-d H:i:s') . "\n";
$date = new DateTime('2000-01-20');
$date->sub(new DateInterval('P7Y5M4DT4H3M2S'));
echo $date->format('Y-m-d H:i:s') . "\n";
?>`

Powyższy przykład wyświetli:

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

Przykład #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') . "\n";
$date->sub($interval);
echo $date->format('Y-m-d') . "\n";
?>`

Powyższy przykład wyświetli:

    2001-03-30
    2001-03-02

### Notatki

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

### Zobacz też:

- DateTime::add() - Adds an amount of days, months, years, hours, minutes and seconds to a DateTime object
- DateTime::diff() - Returns the difference between two DateTime objects
- DateTime::modify() - Alters the timestamp

DateTime::setTimezone
DateTime::__wakeup
DateTime
PHP Manual