(PECL hrtime >= 0.4.3) Whether the measurement is running.

(PECL hrtime >= 0.4.3) Get elapsed ticks for the last interval.

(PHP 4, PHP 5, PHP 7) Converts a Julian Calendar date to Julian Day Count

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

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

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

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

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

(PHP 5 >= 5.5.0, PHP 7) Creates a new object with modified timestamp

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