(PECL rrd >= 0.9.0)
rrd_fetch — Fetch the data for graph as array
$filename
, array $options
) : arrayGets data for graph output from RRD database file as array. This function has same result as rrd_graph(), but fetched data are returned as array, no image file is created.
filenameRRD database file name.
optionsArray of options for resolution specification.
Returns information about retrieved graph data.
For example, this worked for me:
<?php
$result = rrd_fetch( "mydata.rrd", array( "AVERAGE", "--resolution", "60", "--start", "-1d", "--end", "start+1h" ) );
?>
This will fetch all fields. You then have to use something like this to get to a specified rrd field:
<?php
foreach ( $result["data"]["myfield"] as $key => $value )
{
echo "At timestamp $key, the value for myfield is $value.\n";
}
?>
A few years ago, the extension was patched so that it would count options itself. But for me, it's buggy (it does not work with more than 3 arguments) and neither does work.