posix_ctermid()

(PHP 4, PHP 5, PHP 7)

Get path name of controlling terminal

说明

posix_ctermid(void): string

Generates a string which is the pathname for the current controlling terminal for the process. On error this will set errno, which can be checked using posix_get_last_error()

返回值

Upon successful completion, returns string of the pathname to the current controlling terminal. Otherwise FALSE is returned and errno is set, which can be checked with posix_get_last_error().

范例

posix_ctermid() example

This example will display the path to the current TTY.

<?php
echo "I am running from ".posix_ctermid();
?>

参见

• posix_ttyname()Determine terminal device name
• posix_get_last_error()Retrieve the error number set by the last posix function that failed

You can write directly to the tty (screen) even when the shell has redirected output, with:
<?php
$h = fopen(posix_ctermid(), "rb+");
fwrite($h, "Testing direct output\n");
fclose($h);
?>