PHP Unconference Europe 2015

OOP PECL/rrd example

Example #1 OO usage of rrd

<?php
$rrdFile 
dirname(__FILE__) . "/speed.rrd";
$outputPngFile dirname(__FILE__) . "/speed.png";

$creator = new RRDCreator($rrdFile"now -10d"500);
$creator->addDataSource("speed:COUNTER:600:U:U");
$creator->addArchive("AVERAGE:0.5:1:24");
$creator->addArchive("AVERAGE:0.5:6:10");
$creator->save();

$updater = new RRDUpdater($rrdFile);
$updater->update(array("speed" => "12345"), "920804700");
$updater->update(array("speed" => "12357"), "920805000");

$graphObj = new RRDGraph($outputPngFile);
$graphObj->setOptions(
    array(
        
"--start" => "920804400",
        
"--end" => 920808000,
        
"--vertical-label" => "m/s",
        
"DEF:myspeed=$rrdFile:speed:AVERAGE",
        
"CDEF:realspeed=myspeed,1000,*",
        
"LINE2:realspeed#FF0000"
    
)
);
$graphObj->save();
?>

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