(PECL rrd >= 0.9.0)
rrd_graph — Creates image from a data
$filename, array $options): arrayCreates image for a particular data from RRD file.
filename
The filename to output the graph to. This will generally end in either
.png, .svg or
.eps, depending on the format you want to output.
optionsOptions for generating image. See man page of rrd graph for all possible options. All options (data definitions, variable definitions, etc.) are allowed.
Array with information about generated image is returned, 或者在失敗時(shí)返回 false.