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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 ();
?>