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posix_ctermid POSIX

Last updated: Sat, 27 Jan 2007

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# posix_access

(PHP 5 >= 5.1.0RC1)

posix_access -- Determine accessibility of a file

## Описание

bool posix_access ( string file [, int mode] )

posix_access() checks the user's permission of a file.

> Замечание: Когда опция safe mode включена, PHP проверяет, имеют ли файлы/каталоги, с которыми вы собираетесь работать, такой же UID (владельца), как и выполняемый скрипт.

## Список параметров

`file`

  The name of the file to be tested.

`mode`

  A mask consisting of one or more of `POSIX_F_OK`, `POSIX_R_OK`, `POSIX_W_OK` and `POSIX_X_OK`. Defaults to `POSIX_F_OK`.

  `POSIX_R_OK`, `POSIX_W_OK` and `POSIX_X_OK` request checking whether the file exists and has read, write and execute permissions, respectively. `POSIX_F_OK` just requests checking for the existence of the file.

## Возвращаемые значения

Возвращает `TRUE` в случае успешного завершения или `FALSE` в случае возникновения ошибки.

## Примеры

Пример 1. posix_access() example

This example will check if the $file is readable and writable, otherwise will print an error message.

`<?php
$file = 'some_file';
if (posix_access($file, POSIX_R_OK | POSIX_W_OK)) {
echo 'The file is readable and writable!';
} else {
$error = posix_get_last_error();
echo "Error $error: " . posix_strerror($error);
}
?>`

## Смотрите также

posix_get_last_error()
posix_strerror()

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posix_ctermid POSIX

Last updated: Sat, 27 Jan 2007
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