语言参考手册

• 基本语法
  • 跳出HTML状态
  • 指令之间的分隔符
  • 注释
• 类型
  • 介绍
  • 布尔
  • 整数
  • 浮点数
  • 字符串
  • 数组
  • 对象
  • 资源
  • NULL
  • 文档中使用的伪类型和变量
  • 类型模仿
• 变量
  • 基础
  • 预定义变量
  • 变量作用域
  • 变量的变量
  • 来自外部数据源的变量
• 常量
  • 语法
  • 魔法常量
• 表达式
• 运算符
  • 运算符优先级
  • 算术运算符
  • 赋值运算符
  • 位运算符
  • 比较运算符
  • 错误控制运算符
  • 执行运算符
  • 增/减运算符
  • 逻辑运算符
  • 字符串运算符
  • 数组运算符
  • 类型运算符
• Control Structures
  • Introduction
  • if
  • else
  • elseif/else if
  • Alternative syntax for control structures
  • while
  • do-while
  • for
  • foreach
  • break
  • continue
  • switch
  • declare
  • return
  • require
  • include
  • require_once
  • include_once
  • goto
• Functions
  • User-defined functions
  • Function arguments
  • Returning values
  • Variable functions
  • Internal (built-in) functions
  • Anonymous functions
• Classes and Objects (PHP 4)
  • class
  • extends
  • Constructors
  • Scope Resolution Operator (::)
  • parent
  • Serializing objects - objects in sessions
  • The magic functions __sleep and __wakeup
  • References inside the constructor
  • Comparing objects
• Classes and Objects (PHP 5)
  • Introduction
  • The Basics
  • Autoloading Objects
  • Constructors and Destructors
  • Visibility
  • Scope Resolution Operator (::)
  • Static Keyword
  • Class Constants
  • Class Abstraction
  • Object Interfaces
  • Overloading
  • Object Iteration
  • Patterns
  • Magic Methods
  • Final Keyword
  • Object cloning
  • Comparing objects
  • Reflection
  • Type Hinting
  • Late Static Bindings
  • Objects and references
• Namespaces
  • Namespaces overview
  • Defining namespaces
  • Declaring sub-namespaces
  • Defining multiple namespaces in the same file
  • Using namespaces: Basics
  • Namespaces and dynamic language features
  • namespace keyword and __NAMESPACE__ constant
  • Using namespaces: Aliasing/Importing
  • Global space
  • Using namespaces: fallback to global function/constant
  • Name resolution rules
  • FAQ: things you need to know about namespaces
• Exceptions
  • Extending Exceptions
• References Explained
  • What References Are
  • What References Do
  • What References Are Not
  • Passing by Reference
  • Returning References
  • Unsetting References
  • Spotting References
• Predefined variables
  • Superglobals — Superglobals are built-in variables that are always available in all scopes
  • $GLOBALS — References all variables available in global scope
  • $_SERVER — Server and execution environment information
  • $_GET — HTTP GET variables
  • $_POST — HTTP POST variables
  • $_FILES — HTTP File Upload variables
  • $_REQUEST — HTTP Request variables
  • $_SESSION — Session variables
  • $_ENV — Environment variables
  • $_COOKIE — HTTP Cookies
  • $php_errormsg — The previous error message
  • $HTTP_RAW_POST_DATA — Raw POST data
  • $http_response_header — HTTP response headers
  • $argc — The number of arguments passed to script
  • $argv — Array of arguments passed to script
• Predefined Exceptions
  • Exception
  • ErrorException
• Predefined Interfaces
  • Traversable — The Traversable interface
  • Iterator — The Iterator interface
  • IteratorAggregate — The IteratorAggregate interface
  • ArrayAccess — The ArrayAccess interface
  • Serializable — The Serializable interface
• Context options and parameters
  • Socket context options — Socket context option listing
  • HTTP context options — HTTP context option listing
  • FTP context options — FTP context option listing
  • SSL context options — SSL context option listing
  • CURL context options — CURL context option listing
  • Phar context options — Phar context option listing
  • Context parameters — Context parameter listing

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