Warning: This function is
EXPERIMENTAL. The behaviour of this function, the
name of this function, and anything else documented about this
function may change without notice in a future release of PHP.
Use this function at your own risk.
Places the terminal in raw mode. Raw mode is similar to cbreak mode, in
that characters typed are immediately passed through to the user program.
The differences that are that in raw mode, the interrupt, quit, suspend
and flow control characters are all passed through uninterpreted, instead
of generating a signal.
Return Values
Returns TRUE
if any error occurred, otherwise FALSE
.