ncurses_getch

(PHP 4 >= 4.0.7, PHP 5 < 5.3.0, PECL ncurses >= 1.0.0)

ncurses_getch — Read a character from keyboard

说明

int ncurses_getch ( void )

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用户评论:

[#1] Anonymous [2014-03-11 21:50:03]

ncurses_getch() will block if there is no input available. Using fgets() together with stream_set_blocking() has been proposed for non-blocking input, however, fgets() returns escape sequences for cursor, function, and other special keys. Interpreting these is not trivial as the escape sequences depend on the terminal/emulation used.

A possible solution is to use stream_select() to find out whether input is available and then read it with ncurses_getch().

<?php function getch_nonblock($timeout) { $read = array(STDIN); $null = null; // stream_select() uses references, thus variables are necessary for the first 3 parameters if(stream_select($read,$null,$null,floor($timeout / 1000000),$timeout % 1000000) != 1) return null; return ncurses_getch(); } while(true) { $key = getch_nonblock(1000000); if(is_null($key)) { // do something useful here continue; } if($key == NCURSES_KEY_F10) break; // Quit on F10 } ?>

Low timeout values can yield high CPU usage of your script, so set the timeout as high as possible for your application.

[#2] petr at hroch dot info [2006-11-14 02:11:25]

While function ncurses_nodelay() is still not implemented and if you need a non-blocking getch,
following code might help.

<?php $init = ncurses_init(); $full = ncurses_newwin (0,0,0,0); ncurses_wborder($full,0,0,0,0,0,0,0,0); ncurses_wrefresh($full); $running = true; $fp = fopen("php://stdin","r"); //open direct input stream for reading stream_set_blocking($fp,0); //set non-blocking mode while ($running) { while (($buf = fgets($fp, 4096)) != false) { //fgets is required if we want to handle escape sequenced keys $buffer .= $buf; } if ($buffer != "") { switch ($buffer) { case " ": { //exit on space key ncurses_end(); exit; } default: { ncurses_mvwaddstr($full,2,2,"$buffer"); //display input } } $buffer = ""; //empty buffer } // You can do something interesting here, while we're not waiting for an input ncurses_mvwaddstr($full,4,4,microtime(true)); ncurses_wrefresh($full); usleep(1); //reduce cpu usage } ?>

[#3] php at kormoc dot com [2005-11-22 15:45:46]

After banging my head over this for awhile, I discovered, you must use ncurses_keypad($window, true); to enable the arrow keys and f keys to work correctly.

[#4] joeldegan AT yahoo.com [2002-12-16 12:29:30]

When using getch to capture KEY_* events remember that the keypad is arranged like this:

+-----+------+-------+
| A1  |  up  |  A3   |
+-----+------+-------+
|left |  B2  | right |
+-----+------+-------+
| C1  | down |    C3  |
+-----+------+-------+

You use has_key to capture these and act upon them.

man curs_getch for more info.

[#5] pablorNOSPAM at nkstudios dot net [2002-09-13 13:40:15]

A custom php ncurses_getstr function..

<?php function ncurses_getstr($strlen){ for ($x=0;$x<$strlen;$x++){ $string .= chr(ncurses_getch()); } return $string; } ncurses_init(); ncurses_addstr(ncurses_getstr(6)); ncurses_refresh(); ncurses_getch(); ncurses_end(); ?>