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PHP Manual
RRD 函數
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

說(shuō)明

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

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

參數

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, 或者在失敗時(shí)返回 false.

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