date()

Full information can be found in the PHP Manual

string date ( string $format [, int $timestamp = time() ] )

This parameter determines what is returned by the functon. For example…

• date('Y-m-d H:i:s') ⇒ 2013-06-19 09:32:07
• date('jS M y') ⇒ 19th Jun 13
• date('Y') ⇒ 2013
• date('F') ⇒ June

The optional $timestamp parameter is an integer Unix timestamp that defaults to the current local time if a timestamp is not given. In other words, it defaults to the value of time().