SymfonyWorld Online 2022 Winter Edition


(PHP 4, PHP 5, PHP 7, PHP 8)

posix_ctermidGet path name of controlling terminal


posix_ctermid(): string|false

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()


This function has no parameters.

Return Values

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().


Example #1 posix_ctermid() example

This example will display the path to the current TTY.

echo "I am running from ".posix_ctermid();

See Also

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User Contributed Notes 1 note

phpmanual at remove dot mark dot griffin dot email
6 years ago
You can write directly to the tty (screen) even when the shell has redirected output, with:

= fopen(posix_ctermid(), "rb+");
fwrite($h, "Testing direct output\n");
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