Введение

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.

Замечание: 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

Требования

Эти функции всегда доступны.

Установка

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

Предопределенные константы

Перечисленные ниже константы определены данным расширением и могут быть доступны только в том случае, если PHP был собран с поддержкой этого расширения или же в том случае, если данное расширение подгружается во время выполнения.

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)

Настройка во время выполнения

Данное расширение не определяет никакие директивы конфигурации в php.ini.

Типы ресурсов

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

add a note User Contributed Notes
Direct IO Functions

tom at bitworks dot de
03-Nov-2007 06:41


to use mandatory locking on a linux system, the filesystem has to be well prepared.



# /etc/fstab: static file system information.

#

# <file system> <mount point>   <type>  <options>               <dump>  <pass>

/dev/hda1       /               ext3    errors=remount-ro,mand  0       1

/dev/hda2       none            swap    sw                      0       0

proc            /proc           proc    defaults                0       0

/dev/fd0        /floppy         auto    user,noauto             0       0

/dev/cdrom      /cdrom          iso9660 ro,user,noauto          0       0 



For example here the ext3 partition has been prepared for mandatory locking. Otherwise no dio_function will work on the system.

richard d_0t cubek a_t example D0_t com
25-Sep-2007 01:13


IMPORTANT:



--enable-dio is NOT recognized as an option. After reporting a bug, i got following answer:



It is not bundled anymore. See http://pecl.php.net/dio to fetch the CVS version (being unmaintained, there is no release in pecl). Not a bug > bogus.

add a note