posix_ctermid

(PHP 4, PHP 5, PHP 7)

posix_ctermid — Get path name of controlling terminal

说明

posix_ctermid ( void ) : string

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()

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

posix_ttyname() - Determine terminal device name
posix_get_last_error() - Retrieve the error number set by the last posix function that failed

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);

?>