html/graph.php

   1 <?php
   2 $RRDFILE="/home/nirgal/ampy/power.rrd";
   3 $IMGFILE="/tmp/power.svg";
   4 $REFRESH=30;
   5
   6 $result=rrd_graph("$IMGFILE", [
   7         "--imgformat", "SVG",
   8         "-s", "now-1h",
   9         #"-e", "now-8h",
  10         "--width", "1000",
  11         "--height", "500",
  12         "--vertical-label", "watts",
  13         "--lower-limit", "0",
  14         #"--logarithmic",
  15         "DEF:watts=${RRDFILE}:watts:AVERAGE",
  16         "LINE1:watts#FF0000"
  17 ]);
  18 if ($result === FALSE) {
  19         echo("Error in rrd_graph");
  20         die();
  21 }
  22 header("Content-Type: image/svg+xml");
  23 #header("Refresh: $REFRESH");
  24 readfile($IMGFILE);
  25 ?>