PHP 5.6.0 released

ncurses_getch

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

ncurses_getchخواندن کاراکتر از صفحه کلید

Description

int ncurses_getch ( void )
Warning

This function is EXPERIMENTAL. The behaviour of this function, its name, and surrounding documentation may change without notice in a future release of PHP. This function should be used at your own risk.

Warning

This function is currently not documented; only its argument list is available.

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User Contributed Notes 5 notes

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0
Anonymous
5 months ago
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.
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petr at hroch dot info
7 years ago
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
}
?>
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php at kormoc dot com
8 years ago
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.
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0
joeldegan AT yahoo.com
11 years ago
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.
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0
pablorNOSPAM at nkstudios dot net
11 years ago
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();

?>
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