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.
Erases all lines from cursor to end of screen and creates blanks. Blanks
created by ncurses_clrtobot() have the current
background rendition.
Return Values
Returns TRUE
on success or FALSE
on failure.