PHP Manual
RRD 函数
Gets the timestamp of the first sample from rrd file

rrd_first

(PECL rrd >= 0.9.0)

rrd_first — Gets the timestamp of the first sample from rrd file

说明

rrd_first ( string $file [, int $raaindex = 0 ] ) : int

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

参数

file: RRD database file name.
raaindex: The index number of the RRA that is to be examined. Default value is 0.

返回值

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

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