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(PHP 5 >= 5.5.0, PHP 7, PHP 8)
DateTimeInterface was created so that parameter, return, or property type declarations may accept either DateTimeImmutable or DateTime as a value. It is not possible to implement this interface with userland classes.
Common constants that allow for formatting DateTimeImmutable or DateTime objects through DateTimeImmutable::format() and DateTime::format() are also defined on this interface.
DateTimeInterface::ATOM
DATE_ATOM
DATE_COOKIE
DateTimeInterface::ISO8601
DATE_ISO8601
Note: This format is not compatible with ISO-8601, but is left this way for backward compatibility reasons. Use
DateTimeInterface::ISO8601_EXPANDED
,DateTimeInterface::ATOM
for compatibility with ISO-8601 instead. (ref ISO8601:2004 section 4.3.3 clause d)
DateTimeInterface::ISO8601_EXPANDED
DATE_ISO8601_EXPANDED
Note: This format allows for year ranges outside of ISO-8601's normal range of
0000
-9999
by always including a sign character. It also addresses that that timezone part (+01:00
) is compatible with ISO-8601.
DateTimeInterface::RFC822
DATE_RFC822
DateTimeInterface::RFC850
DATE_RFC850
DateTimeInterface::RFC1036
DATE_RFC1036
DateTimeInterface::RFC1123
DATE_RFC1123
DateTimeInterface::RFC7231
DATE_RFC7231
DateTimeInterface::RFC2822
DATE_RFC2822
DateTimeInterface::RFC3339
DATE_RFC3339
DATE_ATOM
DateTimeInterface::RFC3339_EXTENDED
DATE_RFC3339_EXTENDED
DateTimeInterface::RSS
DATE_RSS
DateTimeInterface::W3C
DATE_W3C
Version | Description |
---|---|
8.2.0 |
The constant DateTimeInterface::ISO8601_EXPANDED
was added.
|
7.2.0 | The class constants of DateTime are now defined on DateTimeInterface. |