(PHP 5 >= 5.2.0, PHP 7) Returns date formatted according to given format

(PHP 5 >= 5.2.0, PHP 7) Alters the timestamp

(PHP 5 >= 5.2.0, PHP 7) The __wakeup handler

(PHP 5 >= 5.3.0, PHP 7) Returns the difference between two DateTime objects

(PHP 5 >= 5.3.0, PHP 7) Sets the date and time based on an Unix timestamp

(PHP 5 >= 5.2.0, PHP 7) Sets the date public

(PHP 5 >= 5.2.0, PHP 7) Return time zone relative to given DateTime

(PHP 5 >= 5.3.0, PHP 7) Returns the warnings and errors