(PHP 4 >= 4.0.7, PHP 5 < 5.3.0, PECL ncurses >= 1.0.0)
ncurses_flushinp — Flush keyboard input buffer
此函数是实验性的。此函数的表象，包括名称及其相关文档都可能在未来的 PHP 发布版本中未通知就被修改。使用本函数风险自担 。
Throws away any typeahead that has been typed and has not yet been read by your program.
Returns FALSE on success, otherwise TRUE.