posix_isatty

(PHP 3 >= 3.0.13, PHP 4, PHP 5)

posix_isatty -- Determine if a file descriptor is an interactive terminal

Description

bool posix_isatty ( int fd )

警告

本函数暂无文档，仅有参数列表。

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hfuecks at phppatterns dot com
07-May-2004 05:12


Can be useful to determine whether output is being piped elsewhere, for PHP shell scripts, for example;



#!/usr/local/bin/php

<?php

if ( !posix_isatty(STDOUT) ) {

    fwrite(STDOUT, "Invalid TTY\n");

    exit(2);

}

fwrite(STDOUT, "Enter you name\n");

$name = fgets(STDIN);

fwrite(STDOUT,"Hello $name\n");

exit(0);

?>



If this script is like:



script.php > outfile



outfile will contain "Invalid TTY"

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