(PHP 4, PHP 5, PHP 7) Return current Unix timestamp

(PHP 5 >= 5.2.0, PHP 7) Alias of

(PHP 4, PHP 5, PHP 7) Get the local time array

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

(PHP 5 >= 5.3.0, PHP 7) Creates a new DatePeriod object

(PHP 5 >= 5.6.0, PHP 7) Returns new DateTimeImmutable object encapsulating the given DateTime object

(PHP 5 >= 5.3.0, PHP 7) Alias of

(PHP 4, PHP 5, PHP 7) Format a GMT/UTC date/time

(PHP 5 >= 5.3.0, PHP 7) Returns location information for a timezone

(PHP 5 >= 5.1.0, PHP 7) Gets the default timezone used by all date/time functions in a script