php man page for rrd_first

RRD_FIRST(3)								 1							      RRD_FIRST(3)

rrd_first - Gets the timestamp of the first sample from rrd file.

SYNOPSIS
       int rrd_first (string  $file, [int  $raaindex])

DESCRIPTION
	Returns the first data sample from the specified RRA of the RRD file.

PARAMETERS
	      o $file
		- RRD database file name.

	      o $raaindex
		- The index number of the RRA that is to be examined. Default value is 0.

RETURN VALUES
	Integer number of unix timestamp, FALSE if some error occurs.

PHP Documentation Group 													      RRD_FIRST(3)