posix_isatty
Determine if a file descriptor is an interactive terminal
Description
bool posix_isatty
( mixed $fd
)
Parameters
-
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.
Return Values
Returns TRUE if fd is an open descriptor connected
to a terminal and FALSE otherwise.