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.

相关文章

php apc 函数 load a binary dump from a file into the apc file/user cache php classkit 函数 import new class method definitions from a file php cubrid 函数 import blob/clob data from a file php dbase 函数 gets a record from a database as an associative array php db++ 函数 get first tuple from relation php grapheme 函数 returns part of haystack string from the first occurrence of case insensitive needle to the end of haystack php rrd 函数 gets latest error message php rrd 函数 gets the timestamp of the first sample from rrd file php rrd 函数 creates image from a data php rrd 函数 gets information about rrd file php rrd 函数 gets unix timestamp of the last sample php rrd 函数 restores the rrd file from xml dump php sqlsrv 函数 gets field data from the currently selected row php ssdeep 函数 create a fuzzy hash from a file php statistic 函数 returns the t value from the independent two sample t test php uopz 函数 gets the static variables from function or method scope php yaml 函数 parse a yaml stream from a file php yp/nis 函数 returns the first key value pair from the named map php splfileobject gets line from file php splfileobject gets line from file and strip html tags

关注编程学问公众号