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posix_isatty
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posix_isatty

Name

posix_isatty — Determine whether or not a file descriptor is connected to a TTY (POSIX.1, 4.7.1)

Synopsis

bool posix_isatty(fd); int fd: File descriptor to examine

Returns

TRUE if the given file descriptor is a TTY; FALSE otherwise.

Description

This function is used to determine whether a given file descriptor refers to a TTY.

Version

PHP 3.0.13+, PHP 4.0b4+

Example

Example 1081. Testing whether a file descriptor refers to a TTY

if (posix_isatty($fd)) {
    echo "It's a TTY.\n";
} else {
    echo "It's not a TTY.\n";
}

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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 http://www.opencontent.org/openpub/). The authors of this book have elected not to choose any options under the OPL. This online book was obtained from http://www.fooassociates.com/phpfer/ 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.