(PHP 5 >= 5.2.0, PHP 7) Returns the timezone offset

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

(PHP 5 >= 5.3.0, PHP 7) Returns new DateTime object formatted according to the specified format

(PHP 5 >= 5.3.0, PHP 7) Subtracts an amount of days, months, years, hours, minutes and seconds from a DateTime

(PHP 5 >= 5.2.0, PHP 7) Sets the time zone for the DateTime object

(PHP 5 >= 5.3.0, PHP 7) Gets the Unix timestamp

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

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

(PHP 5 >= 5.3.0, PHP 7) Adds an amount of days, months, years, hours, minutes and seconds to a DateTime

(PHP 5 >= 5.2.0, PHP 7) Returns new DateTime object