Downloads
Documentation
Get Involved
Help
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 »
« 注释
PHP 手册
语言参考
切换语言:
English
German
Spanish
French
Italian
Japanese
Brazilian Portuguese
Russian
Turkish
Ukrainian
Chinese (Simplified)
Other
类型
目录
简介
类型系统
NULL
Boolean 布尔类型
Integer 整型
Float 浮点型
String 字符串
数字字符串
Array 数组
Object 对象
Enum 枚举
Resource 资源类型
Callback / Callable 类型
Mixed
Void
Never
相对类类型
Value 类型
Iterable 可迭代对象
类型声明
类型转换
改进此页面
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。