If you wish to access the RRDTool data programmatically from PHP, then you have two options.
If you just want a few set values, you could call rrdtool using the PRINT directive to output text on stdout, and capture that, though you then have to parse the captured text. If you want to access the entire data series, then you could call 'rrdtool fetch' or 'rrdtool xport' to obtain the data; also, you could install the PHP RRDtool library, and then access it directly from the PHP code rather than having to fork off a separate process and catch the output. This might be the most efficient way to achieve what you want. Steve Steve Shipway University of Auckland ITS UNIX Systems Design Lead [email protected]<mailto:[email protected]> Ph: +64 9 373 7599 ext 86487 ________________________________ From: [email protected] [[email protected]] on behalf of Md. Ali Ahsan Rana [[email protected]] Sent: Saturday, 21 June 2014 4:28 p.m. To: [email protected] Subject: [rrd-users] Assign RRDGraph DEF variables to external variable? Hello EveryOne, I am constructing and executing rrdgraph command from php. A sample is as follows: $series = "DEF:'test'='$rrd_dir/test.rrd':'sum':AVERAGE " ."LINE2:test#00FF00:'Test Graph' " Now, I want the rrd variable 'test' to be assigned to an external php variable so that I can use that value for other task. How I can achieve this please? Regards Rana
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