posix_isatty
(PHP 4, PHP 5)
posix_isatty — Determine if a file descriptor is an interactive terminal
Description
bool posix_isatty
( int $fd
)
Determines if the file descriptor fd refers to a valid terminal type device.
Parameters
- fd
-
The file descriptor.
Return Values
Returns TRUE if fd is an open descriptor connected to a terminal and FALSE otherwise.