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The DateTimeInterface interface
(PHP 5 >= 5.5.0, PHP 7)
Introduction
DateTimeInterface is meant so that both DateTime and DateTimeImmutable can be type hinted for. It is not possible to implement this interface with userland classes.
Class synopsis
DateTimeInterface
{
/* Constants */
/* Methods */
}Predefined Constants
DateTimeInterface::ATOM
-
DATE_ATOM
- Atom (example: 2005-08-15T15:52:01+00:00)
-
DATE_COOKIE
- HTTP Cookies (example: Monday, 15-Aug-2005 15:52:01 UTC)
DateTimeInterface::ISO8601
-
DATE_ISO8601
-
ISO-8601 (example: 2005-08-15T15:52:01+0000)
Note: This format is not compatible with ISO-8601, but is left this way for backward compatibility reasons. Use
DateTime::ATOM
orDATE_ATOM
for compatibility with ISO-8601 instead. DateTimeInterface::RFC822
-
DATE_RFC822
- RFC 822 (example: Mon, 15 Aug 05 15:52:01 +0000)
DateTimeInterface::RFC850
-
DATE_RFC850
- RFC 850 (example: Monday, 15-Aug-05 15:52:01 UTC)
DateTimeInterface::RFC1036
-
DATE_RFC1036
- RFC 1036 (example: Mon, 15 Aug 05 15:52:01 +0000)
DateTimeInterface::RFC1123
-
DATE_RFC1123
- RFC 1123 (example: Mon, 15 Aug 2005 15:52:01 +0000)
DateTimeInterface::RFC2822
-
DATE_RFC2822
- RFC 2822 (example: Mon, 15 Aug 2005 15:52:01 +0000)
DateTimeInterface::RFC3339
-
DATE_RFC3339
-
Same as
DATE_ATOM
(since PHP 5.1.3) DateTimeInterface::RFC3339_EXTENDED
-
DATE_RFC3339_EXTENDED
- RFC 3339 EXTENDED format (since PHP 7.0.0) (example: 2005-08-15T15:52:01.000+00:00)
DateTimeInterface::RSS
-
DATE_RSS
- RSS (example: Mon, 15 Aug 2005 15:52:01 +0000)
DateTimeInterface::W3C
-
DATE_W3C
- World Wide Web Consortium (example: 2005-08-15T15:52:01+00:00)
Changelog
Version | Description |
---|---|
7.2.0 | The class constants of DateTime are now defined on DateTimeInterface. |
5.5.8 | Trying to implement DateTimeInterface raises a fatal error now. Formerly implementing the interface didn't raise an error, but the behavior was erroneous. |
Table of Contents
- DateTime::diff — Returns the difference between two DateTime objects
- DateTime::format — Returns date formatted according to given format
- DateTime::getOffset — Returns the timezone offset
- DateTime::getTimestamp — Gets the Unix timestamp
- DateTime::getTimezone — Return time zone relative to given DateTime
- DateTime::__wakeup — The __wakeup handler
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Steph