php man page for variant_date_to_timestamp

VARIANT_DATE_TO_TIMESTAMP(3)						 1					      VARIANT_DATE_TO_TIMESTAMP(3)

variant_date_to_timestamp - Converts a variant date/time value to Unix timestamp

SYNOPSIS
       int variant_date_to_timestamp (variant  $variant)

DESCRIPTION
	Converts $variant from a VT_DATE (or similar) value into a Unix timestamp. This allows easier interopability between the Unix-ish parts of
       PHP and COM.

PARAMETERS
	      o $variant
		- The variant.

RETURN VALUES
	Returns a unix timestamp.

SEE ALSO
       variant_date_from_timestamp(3), date(3), strftime(3).

PHP Documentation Group 											      VARIANT_DATE_TO_TIMESTAMP(3)