posix_ctermid

(PHP 4, PHP 5, PHP 7, PHP 8)

posix_ctermidGet path name of controlling terminal

说明

posix_ctermid ( ) : string|false

Generates a string which is the pathname for the current controlling terminal for the process. On error this will set errno, which can be checked using posix_get_last_error()

参数

此函数没有参数。

返回值

Upon successful completion, returns string of the pathname to the current controlling terminal. Otherwise false is returned and errno is set, which can be checked with posix_get_last_error().

范例

Example #1 posix_ctermid() example

This example will display the path to the current TTY.

<?php
echo "I am running from ".posix_ctermid();
?>

参见

User Contributed Notes

phpmanual at remove dot mark dot griffin dot email 19-Apr-2016 09:18
You can write directly to the tty (screen) even when the shell has redirected output, with:

<?php
$h
= fopen(posix_ctermid(), "rb+");
fwrite($h, "Testing direct output\n");
fclose($h);
?>