(PECL rrd >= 0.9.0)
rrd_create — Creates rrd database file
$filename, array $options): boolCreates the rdd database file.
filenameFilename for newly created rrd file.
optionsOptions for rrd create - list of strings. See man page of rrd create for whole list of options.
成功時(shí)返回 true， 或者在失敗時(shí)返回 false。