( void )
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.
ncurses_flash() flashes the screen, and if
its not possible, sends an audible alert (bell).
Returns FALSE on success, otherwise TRUE.
See also: ncurses_beep()