Heres a function to get a string from a specific window and return it on ENTER.
// Dynamic String Input (converts INT ASCII to CHAR)
function ncurses_wgetstr($win){
    $strlen = 1;
    for ($sx=0;$sx<$strlen;$sx++){
        $strlen++;
        $ch = ncurses_wgetch($win);
        if ($ch == 13){
            return $str;
            break 2;
        }
        $str .= chr($ch);
    }
}
Example:
$ncurse = ncurses_init();
$fullscreen = ncurses_newwin (0,0,  0,0); 
ncurses_border(0,0,  0,0,  0,0,  0,0);
ncurses_refresh();
while (1){
    $keyPressed = ncurses_wgetstr($fullscreen);
    ncurses_wrefresh($fullscreen);
}