posix_isatty() - posix函数（可移植操作系统接口）

乐乐2年前 (2023-11-21)阅读数 55#技术干货

文章标签返回值

posix_isatty()

(PHP 4, PHP 5, PHP 7)

Determine if a file descriptor is an interactive terminal

posix_isatty() - posix函数（可移植操作系统接口）

说明

posix_isatty(mixed $fd): bool

Determines if the file descriptor$fdrefers to a valid terminal type device.

参数

$fd

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

In almost all cases, you will want to provide a file resource.

返回值

ReturnsTRUEif$fdis an open descriptor connected to a terminal andFALSEotherwise.

参见

posix_ttyname()Determine terminal device name
stream_isatty()Check if a stream is a TTY

Can be useful to determine whether output is being piped elsewhere, for PHP shell scripts, for example;
#!/usr/local/bin/php

If this script is like:
script.php > outfile
outfile will contain "Invalid TTY"

内容声明：本文中引用的各种信息及资料（包括但不限于文字、数据、图表及超链接等）均来源于该信息及资料的相关主体（包括但不限于公司、媒体、协会等机构）的官方网站或公开发表的信息。部分内容参考包括:(百度百科,百度知道,头条百科,中国民法典,刑法,牛津词典,新华词典,汉语词典,国家院校,科普平台)等数据,内容仅供参考使用,不准确地方联系删除处理！本站为非盈利性质站点,本着为中国教育事业出一份力,发布内容不收取任何费用也不接任何广告!)