PHP 手册
后退 |  | 前进

# XXVII. Direct IO Functions

# 简介

PHP supports the direct io functions as described in the Posix Standard (Section 6) for performing I/O functions at a lower level than the C-Language stream I/O functions (fopen(), fread(),..). The use of the DIO functions should be considered only when direct control of a device is needed. In all other cases, the standard filesystem functions are more than adequate.

> 注: 本扩展已被移动到 PECL 库中且自以下版本起不再被绑定到 PHP 中：5.1.0.

This extension is only available on Windows Platforms as of PHP 5.0.0

# 需求

要编译本扩展模块不需要外部库文件。

# 安装

To get these functions to work, you have to configure PHP with --enable-dio.

# 预定义常量

以下常量由本扩展模块定义，因此只有在本扩展模块被编译到 PHP 中，或者在运行时被动态加载后才有效。

`c` (integer)

`F_DUPFD` (integer)

`F_GETFD` (integer)

`F_GETFL` (integer)

`F_GETLK` (integer)

`F_GETOWN` (integer)

`F_RDLCK` (integer)

`F_SETFL` (integer)

`F_SETLK` (integer)

`F_SETLKW` (integer)

`F_SETOWN` (integer)

`F_UNLCK` (integer)

`F_WRLCK` (integer)

`O_APPEND` (integer)

`O_ASYNC` (integer)

`O_CREAT` (integer)

`O_EXCL` (integer)

`O_NDELAY` (integer)

`O_NOCTTY` (integer)

`O_NONBLOCK` (integer)

`O_RDONLY` (integer)

`O_RDWR` (integer)

`O_SYNC` (integer)

`O_TRUNC` (integer)

`O_WRONLY` (integer)

`S_IRGRP` (integer)

`S_IROTH` (integer)

`S_IRUSR` (integer)

`S_IRWXG` (integer)

`S_IRWXO` (integer)

`S_IRWXU` (integer)

`S_IWGRP` (integer)

`S_IWOTH` (integer)

`S_IWUSR` (integer)

`S_IXGRP` (integer)

`S_IXOTH` (integer)

`S_IXUSR` (integer)

# 运行时配置

本扩展模块在 `php.ini` 中未定义任何配置选项。

# 资源类型

One resource type is defined by this extension: a file descriptor returned by dio_open().

后退 | 起点 | 前进
dbx_sort | 上一级 | dio_close