Constants of the newly added date function in PHP 5 _php tutorial

PHP 5.1.1 defines the following constants to provide a standard date expression method, which can be used for date format functions such as Date ().

Date_atom (String)

Atomic clock format (eg: 2005-08-15t15:52:01+00:00)

Date_cookie (String)

HTTP cookie format (e.g. Mon, 2005 15:52:01 UTC)

date_iso8601 (String)

ISO-8601 (eg: 2005-08-15t15:52:01+0000)

date_rfc822 (String)

RFC 822 (e.g.: Mon, 2005 15:52:01 UTC)

date_rfc850 (String)

RFC 850 (for example: Monday, 15-aug-05 15:52:01 UTC)

date_rfc1036 (String)

RFC 1036 (for example: Monday, 15-aug-05 15:52:01 UTC)

Date_rfc1123 (String)

RFC 1123 (e.g.: Mon, 2005 15:52:01 UTC)

date_rfc2822 (String)

RFC 2822 (eg: Mon, 2005 15:52:01 +0000)

Date_rss (String)

RSS (eg: Mon, 2005 15:52:01 UTC)

DATE_W3C (String)

World Wide Web Consortium (e.g., 2005-08-15t15:52:01+00:00)

For example, to output a date format that RSS requires, you can simply implement it with the following code:

echo Date (DATE_RSS);

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