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posix_ttyname — Determine terminal device name for a file descriptor (POSIX.1, 4.7.2).


string posix_ttyname(fd);
int fd: File descriptor to examine


The pathname of the controlling terminal for a given file descriptor, or FALSE on error.


This function examines the file descriptor given by fd and returns the pathname of the terminal which is open on that descriptor, if there is one. FALSE will be returned on error; for instance, if the given descriptor has no terminal open on it.


PHP 3.0.13+, PHP 4.0b4+


Example 1091. Finding the terminal for a file descriptor

if (FALSE === ($ttyname = posix_ttyname($fd))) {
    echo "Could not get terminal name.\n";
} else {
    echo "The terminal connected to the descriptor is: '$ttyname'.\n";

PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at The authors of this book have elected not to choose any options under the OPL. This online book was obtained from and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.

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