(PHP 4 >= 4.0.7, PHP 5 < 5.3.0, PECL ncurses >= 1.0.0)
ncurses_raw — Switch terminal into raw mode
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 。
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 difference is that in raw mode, the interrupt, quit, suspend and flow control characters are all passed through uninterpreted, instead of generating a signal.
Returns TRUE if any error occurred, otherwise FALSE.