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.

add a note

User Contributed Notes 2 notes

down

-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.

add a note

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

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 开发编程科技 Elasticsearch HTML/CSS/XML 网络 JAVA NoSQL 数据库面试 C/C++ Golang Git 算法操作系统正则表达式 Redis 互联网 MySql JavaScript 运维软件国际架构设计 Mac OS TCP/IP Excel Vim Windows Socket Oracle VR MongoDB Python 运营 MemCache 商业硬件电子娱乐设计 nginx 摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 [PHP] inet_pton/inet_ntop IP地址转换函数 array_multisort() 多字段排序 PHPMailer设置utf8 PHPMailer字符集CharSet ADORecordSet对象 adodb手册 PHP 8.1 [鸟哥]PHP_INT_MIN 和 -9223372036854775808 opcache预加载 Composer的Packagist资源 mysql面试题 [鸟哥]PHP FFI详解 - 一种全新的PHP扩展方式 PHP7添加redis扩展 PHP mkdir()写出来的权限与mode值不符合 Packagist / Composer 中国全量镜像 php中几种注释规范利用php soap实现web service PHP获取指定函数定义在哪个文件中及行号

略微加速

PHP官方手册 - 互联网笔记

rrd_fetch

说明

参数

返回值

User Contributed Notes 2 notes