Available on php
See also:
https://www.php.net/manual/en/class.dateinterval.php
staticcreateFromDateString(datetime:String):DateInterval
new(duration:String)
d:Int
days:EitherType<Int, Bool>
f:Float
h:Int
i:Int
invert:Int
m:Int
s:Int
y:Int
format(format:String):String