Downloads
Documentation
Get Involved
Help
Search docs
International PHP Conference Berlin 2025
Getting Started
Introduction
A simple tutorial
Language Reference
Basic syntax
Types
Variables
Constants
Expressions
Operators
Control Structures
Functions
Classes and Objects
Namespaces
Enumerations
Errors
Exceptions
Fibers
Generators
Attributes
References Explained
Predefined Variables
Predefined Exceptions
Predefined Interfaces and Classes
Predefined Attributes
Context options and parameters
Supported Protocols and Wrappers
Security
Introduction
General considerations
Installed as CGI binary
Installed as an Apache module
Session Security
Filesystem Security
Database Security
Error Reporting
User Submitted Data
Hiding PHP
Keeping Current
Features
HTTP authentication with PHP
Cookies
Sessions
Handling file uploads
Using remote files
Connection handling
Persistent Database Connections
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
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
GUI Extensions
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
简介 »
« syslog
PHP 手册
函数参考
其它服务
切换语言:
English
German
Spanish
French
Italian
Japanese
Brazilian Portuguese
Russian
Turkish
Ukrainian
Chinese (Simplified)
Other
RRDtool
简介
安装/配置
需求
安装
示例
Procedural PECL/rrd example
OOP PECL/rrd example
RRD 函数
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
RRDCreator
— The RRDCreator class
RRDCreator::addArchive
— Adds RRA - archive of data values for each data source
RRDCreator::addDataSource
— Adds data source definition for RRD database
RRDCreator::__construct
— Creates new RRDCreator instance
RRDCreator::save
— Saves the RRD database to a file
RRDGraph
— The RRDGraph class
RRDGraph::__construct
— Creates new RRDGraph instance
RRDGraph::save
— Saves the result of query into image
RRDGraph::saveVerbose
— Saves the RRD database query into image and returns the verbose information about generated graph
RRDGraph::setOptions
— Sets the options for rrd graph export
RRDUpdater
— The RRDUpdater class
RRDUpdater::__construct
— Creates new RRDUpdater instance
RRDUpdater::update
— Update the RRD database file
发现了问题?
了解如何改进此页面
•
提交拉取请求
•
报告一个错误
+
添加备注
用户贡献的备注
此页面尚无用户贡献的备注。
↑
and
↓
to navigate •
Enter
to select •
Esc
to close
Press
Enter
without selection to search using Google