vlibDate

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6.13. subInterval()

Function Description
  subInterval (string timestamp , string interval)

Returns a timestamp with the interval subtracted.
Accepted interval values are DAY[S], WEEK[S], MONTH[S], YEAR[S] and CENTURY [CENTURIES].

The returned timestamp is a vlibDate timestamp. For more information on this, please see the IMPORTANT section.

Example

   $pastdate = $date->subInterval($date->now(), '2 CENTURIES 5 YEARS 2 MONTHS 3 DAYS');