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posix_fpathconf

(PHP 8 >= 8.3.0)

posix_fpathconfReturns the value of a configurable limit

说明

posix_fpathconf(resource|int $file_descriptor, int $name): int|false

Returns the value of a configurable limit from name for a file descriptor resource

参数

file_descriptor

The file descriptor, which is expected to be either a file resource or an int. An int will be assumed to be a file descriptor that can be passed directly to the underlying system call.

name

The name of the configurable limit, one of the following. POSIX_PC_LINK_MAX, POSIX_PC_MAX_CANON POSIX_PC_MAX_INPUT, POSIX_PC_NAME_MAX POSIX_PC_PATH_MAX, POSIX_PC_PIPE_BUF POSIX_PC_CHOWN_RESTRICTED, POSIX_PC_NO_TRUNC POSIX_PC_ALLOC_SIZE_MIN, POSIX_PC_SYMLINK_MAX

返回值

Returns the configurable limit or false.

错误/异常

Throws a ValueError when resource is invalid.

示例

示例 #1 posix_fpathconf() example

This example will get the max path name's length in bytes for the current dir.

<?php
$fd
= fopen(__DIR__, "r");
echo
posix_fpathconf($fd, POSIX_PC_PATH_MAX);
?>

以上示例会输出:

4096

注释

参见

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