Download
Download Latest
Version Support Policy
Documentation
Documentation Home
Tutorial
Project
Governance
Branding
License
GitHub Repository
Community
Contribute to PHP
Online Communities
Events | Conferences
Mailing Lists
PHP 8.5
All Releases
Search docs
Getting Started
Introduction
A simple tutorial
Language Reference
Basic syntax
Types
Variables
Constants
Expressions
Operators
Control Structures
Functions
Classes and Objects
Namespaces
Exceptions
Generators
References Explained
Predefined Variables
Predefined Exceptions
Predefined Interfaces and Classes
Context options and parameters
Supported Protocols and Wrappers
Security
Introduction
General considerations
Installed as CGI binary
Installed as an Apache module
Filesystem Security
Database Security
Error Reporting
Using Register Globals
User Submitted Data
Magic Quotes
Hiding PHP
Keeping Current
Features
HTTP authentication with PHP
Cookies
Sessions
Dealing with XForms
Handling file uploads
Using remote files
Connection handling
Persistent Database Connections
Safe Mode
Command line usage
Garbage Collection
DTrace Dynamic Tracing
Function Reference
Affecting PHP's Behaviour
Audio Formats Manipulation
Authentication Services
Command Line Specific Extensions
Compression and Archive Extensions
Credit Card Processing
Cryptography Extensions
Database Extensions
Date and Time Related Extensions
File System Related Extensions
Human Language and Character Encoding Support
Image Processing and Generation
Mail Related Extensions
Mathematical Extensions
Non-Text MIME Output
Process Control Extensions
Other Basic Extensions
Other Services
Search Engine Extensions
Server Specific Extensions
Session Extensions
Text Processing
Variable and Type Related Extensions
Web Services
Windows Only Extensions
XML Manipulation
Keyboard Shortcuts
?
This help
j
Next menu item
k
Previous menu item
g p
Previous man page
g n
Next man page
G
Scroll to bottom
g g
Scroll to top
g h
Goto homepage
g s
Goto search
(current page)
/
Focus search box
RRD 函数
PHP Manual
PHP Manual
»
RRD
»
RRD 函数
RRD 函数
目录
rrd_create
— 创建 rrd 数据库文件
rrd_error
— 获取最新的错误信息
rrd_fetch
— 获取图表数据数组
rrd_first
— 从 rrd 文件中获取第一个样本的时间戳
rrd_graph
— 从数据创建图像
rrd_info
— 获取 rrd 文件有关信息
rrd_last
— 获取最后一个样本的 Unix 时间戳
rrd_lastupdate
— 获取有关上次更新数据的信息
rrd_restore
— 从 XML 转储中恢复 RRD 文件
rrd_tune
— 调整 RRD 数据库文件头选项
rrd_update
— 更新 RRD 数据库
rrd_version
— 获取底层 rrdtool 库的相关信息
rrd_xport
— 导出 RRD 数据库的相关信息
rrdc_disconnect
— 关闭所有未完成的 rrd 缓存守护进程连接
↑
and
↓
to navigate •
Enter
to select •
Esc
to close •
/
to open
Press
Enter
without selection to search using Google