rrd_fetch

(PECL rrd >= 0.9.0)

rrd_fetch — Fetch the data for graph as array

说明

rrd_fetch(string $filename, array $options): array

Gets 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.

参数

filename: RRD database file name.
options: Array of options for resolution specification.

返回值

Returns information about retrieved graph data.

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User Contributed Notes 2 notes

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-3

stephanecharette at gmail dot com ¶

8 years ago


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";
}
?>

down

-38

ernestas at versme dot net ¶

8 years ago


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.

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官方地址：https://www.php.net/manual/en/function.rrd-fetch.php

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rrd_fetch

说明

参数

返回值

User Contributed Notes 2 notes