(PECL rrd >= 0.9.0)
Gets the timestamp of the first sample from rrd file.
int rrd_first ( string $file [, int $raaindex = 0 ] )
Returns the first data sample from the specified RRA of the RRD file.
Parameters:
file
RRD database file name.
raaindex
The index number of the RRA that is to be examined. Default value is 0.
Returns:
Integer number of unix timestamp, FALSE if some error occurs.
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