posix_fpathconf
(PHP 8 >= 8.3.0)
posix_fpathconf — Returns the value of a configurable limit
说明
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_CANONPOSIX_PC_MAX_INPUT,POSIX_PC_NAME_MAXPOSIX_PC_PATH_MAX,POSIX_PC_PIPE_BUFPOSIX_PC_CHOWN_RESTRICTED,POSIX_PC_NO_TRUNCPOSIX_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
- posix_pathconf() - Returns the value of a configurable limit
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