# posix_ttyname

(PHP 4, PHP 5, PHP 7)

posix_ttyname — Determine terminal device name

### Description

posix_ttyname ( mixed `$fd` ) : string

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

### Parameters

`fd`

  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.

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

### Return Values

On success, returns a string of the absolute path of the `fd`. On failure, returns `FALSE`