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";
}
?>
rrd_fetch
(PECL rrd >= 0.9.0)
rrd_fetch — 获取图表数据数组
说明
从 RRD 数据库文件获取图表输出的数据数组。此函数与 rrd_graph() 结果相同，但仅返回数据数组，不会生成图像文件。
参数
-
filename -
RRD 数据库文件名。
-
options -
数据间隔规范的数组选项。
返回值
返回检索到的相关图形信息数据。
add a note
User Contributed Notes 2 notes
stephanecharette at gmail dot com ¶
11 years ago
ernestas at versme dot net ¶
11 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.
