PHP 5.6.0 released

posix_isatty

(PHP 4, PHP 5)

posix_isattyDetermine if a file descriptor is an interactive terminal

Descrierea

bool posix_isatty ( mixed $fd )

Determines if the file descriptor fd refers to a valid terminal type device.

Parametri

fd

The file descriptor, which is expected to be either a file resource or an integer. An integer 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.

Valorile întoarse

Returns TRUE if fd is an open descriptor connected to a terminal and FALSE otherwise.

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hfuecks at phppatterns dot com
10 years ago
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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