PHP kézikönyv
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# CXVII. POSIX Functions

# Bevezetés

This module contains an interface to those functions defined in the IEEE 1003.1 (POSIX.1) standards document which are not accessible through other means. POSIX.1 for example defined the open(), read(), write() and close() functions, too, which traditionally have been part of PHP 3 for a long time. Some more system specific functions have not been available before, though, and this module tries to remedy this by providing easy access to these functions.

Figyelem
Sensitive data can be retrieved with the POSIX functions, e.g. posix_getpwnam() and friends. None of the POSIX function perform any kind of access checking when safe mode is enabled. It's therefore strongly advised to disable the POSIX extension at all (use --disable-posix in your configure line) if you're operating in such an environment.

> Megjegyzés: Ez a kiterjesztés nem működik Windows operációs rendszereken!

# Telepítés

POSIX functions are enabled by default. You can disable POSIX-like functions with --disable-posix.

# Előre definiált állandók

Az itt listázott állandókat ez a kiterjesztés definiálja, és csak akkor elérhetőek, ha az adott kiterjesztés be van fordítva a PHP-be, vagy dinamikusan betöltött.

`POSIX_F_OK` (integer)

  Check whether the file exists.

`POSIX_R_OK` (integer)

  Check whether the file exists and has read permissions.

`POSIX_W_OK` (integer)

  Check whether the file exists and has write permissions.

`POSIX_X_OK` (integer)

  Check whether the file exists and has execute permissions.

`POSIX_S_IFBLK` (integer)

  Block special file

`POSIX_S_IFCHR` (integer)

  Character special file

`POSIX_S_IFIFO` (integer)

  FIFO (named pipe) special file

`POSIX_S_IFREG` (integer)

  Normal file

`POSIX_S_IFSOCK` (integer)

  Socket

> Megjegyzés: These constants are available since PHP 5.1.0. Please also note that some of them may not be available in your system.

# Lásd még

The section about Process Control Functions maybe of interest for you.

Előző | Tartalom | Következő
zend_version | Fel | posix_access