php教程

rrd_xport

(PECL rrd >= 0.9.0)

rrd_xportExports the information about RRD database

说明

rrd_xport ( array $options ) : array

Exports the information about RRD database file. This data can be converted to XML file via user space PHP script and then restored back as RRD database file.

参数

options

Array of options for the export, see rrd xport man page.

返回值

Array with information about RRD database file, FALSE when error occurs.

User Contributed Notes

mrezahamedany 25-Jul-2017 05:12
an example that shows the usage of this method ( tested in php version 5.6.30 )

class Rrd{
    public function getData($id , $start , $end)
    {
        $step = 300 ;
        $rrdFile ="/path/to/file/'.$id.rrd";

        try{
            $options = ["--start", $start , "--end", $end ,"-- step",$step,"DEF:out=$rrdFile:name:AVERAGE", "XPORT:out:test"];
            $result = rrd_xport($options);
            $datas = $result['data'][0]['data'];
            foreach($datas as $data => $value){

                if( is_nan($value) === true ) $value = 0 ;
                    $output[] = [$data=>$value] ;
            }
            return json_encode($output);

        }catch (Exception $e){

            dd($e->getMessage());
        }

    }
}

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