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# XXVI. Direct IO Functions

# Introduktion

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.

> Bemærk: This extension has been moved to the PECL repository and is no longer bundled with PHP as of PHP 5.1.0.

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

# Systemkrav

Ingen eksterne libraries er nødvendige for at kompilere denne udvidelse.

# Installation

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

# Foruddefinerede Konstanter

Konstanterne nedenunder er defineret af denne udvidelse, og vil kun være tilgængelige når denne udvidelse enten er blevet kompileret ind i PHP eller dynamisk indsat under runtime.

`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)

# Runtime Konfiguration

Denne udvidelse har intet konfigurations-direktiv defineret i `php.ini`.

# Ressourcetyper

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

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