posix_ttyname

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

posix_ttyname — Determine terminal device name

function posix_ttyname(resource |int $file_descriptor): string |false

Returns a string for the absolute path to the current terminal device that is open on the file descriptor file_descriptor.

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.

On success, returns a string of the absolute path of the file_descriptor. On failure, returns false

On invalid file_descriptor integer values an E_WARNING is raised.

Version	Description
8.5.0	`last_error` is now set to `EBADF` when an invalid `file_descriptor` is encountered.
8.3.0	Type error `E_WARNING` s are now raised for integer coercions following the usual PHP type coercion semantics.
8.3.0	On invalid `file_descriptor` integer values an `E_WARNING` is now raised.

casper at bcx dot nl ¶

20 years ago

<?php
 var_dump( posix_ttyname(STDOUT) );
?>

returns:
string(10) "/dev/pts/0"
When using pseudo terminal 1 (ie ssh)