rar_open
Readline only reads the window size on startup or on SIGWINCH. This means if the window is resized when not in a readline() call, the next call will have odd behavior due to confusion about the window size.
The work-around is to force Readline to re-read the window size by sending it SIGWINCH. This is accomplished using the async interface, which installs the signal handler but returns control to PHP.
The following function is a drop-in replacement for readline(), but re-reads the window size every time:
<?
function xreadline($prompt)
{
global $xreadline, $xreadline_line;
$code = '$GLOBALS["xreadline"] = false;' .
'$GLOBALS["xreadline_line"] = $line;' .
'readline_callback_handler_remove();';
$cb = create_function('$line', $code);
readline_callback_handler_install($prompt, $cb);
$signal = defined("SIGWINCH") ? SIGWINCH : 28;
posix_kill(posix_getpid(), $signal);
$xreadline = true;
while ($xreadline)
readline_callback_read_char();
return is_null($xreadline_line) ? false : $xreadline_line;
}
?>
GNU Readline
简介
The readline functions implement an interface to the GNU Readline library. These are functions that provide editable command lines. An example being the way Bash allows you to use the arrow keys to insert characters or scroll through command history. Because of the interactive nature of this library, it will be of little use for writing Web applications, but may be useful when writing scripts used from a command line.
Note: 本扩展模块在 Windows 平台下不可用。
需求
To use the readline functions, you need to install libreadline. You can find libreadline on the home page of the GNU Readline project, at » http://cnswww.cns.cwru.edu/~chet/readline/rltop.html. It's maintained by Chet Ramey, who's also the author of Bash.
You can also use these functions with the libedit library, a non-GPL replacement for the readline library. The libedit library is BSD licensed and available for download from » http://www.thrysoee.dk/editline/.
安装
To use these functions you must compile the CGI or CLI version of PHP with readline support. You need to configure PHP --with-readline[=DIR]. In order you want to use the libedit readline replacement, configure PHP --with-libedit[=DIR].
运行时配置
本扩展模块在 php.ini 中未定义任何配置选项。
资源类型
本扩展模块未定义任何资源类型。
预定义常量
本扩展模块未定义任何常量。
Table of Contents
- readline_add_history — Adds a line to the history
- readline_callback_handler_install — Initializes the readline callback interface and terminal, prints the prompt and returns immediately
- readline_callback_handler_remove — Removes a previously installed callback handler and restores terminal settings
- readline_callback_read_char — Reads a character and informs the readline callback interface when a line is received
- readline_clear_history — Clears the history
- readline_completion_function — Registers a completion function
- readline_info — Gets/sets various internal readline variables
- readline_list_history — Lists the history
- readline_on_new_line — Inform readline that the cursor has moved to a new line
- readline_read_history — Reads the history
- readline_redisplay — Redraws the display
- readline_write_history — Writes the history
- readline — Reads a line
add a note
User Contributed NotesReadline
david at acz dot org
28-Feb-2007 09:07
28-Feb-2007 09:07
flobee
28-Apr-2006 10:29
28-Apr-2006 10:29
re to: ds at NOSPAM dot undesigned dot org dot za
cool program! note when trying to exec() something:
in the while loop you need to reset exec() returns or you will get all results of all executions (on my my windows and or cygwin :-(
like:
<?php
// your class prompt()
echo "Enter something or 'exit' to quit\n";
do {
$cmdline = new prompt();
$buffer = $cmdline->get('shell command: ');
// init/ reset first!
$data = null;
$return = null;
// now start:
echo "You said: $buffer\n";
if (!empty($buffer)) {
$x = exec($buffer, $data, $return);
print_r($data);
}
} while ($buffer !== "exit");
echo "Goodbye\n";
jeffrey at thompsonic dot com
22-Feb-2005 06:18
22-Feb-2005 06:18
Here's an easy way without readline() if you don't have it compiled in already:
$fp = fopen("php://stdin","r");
$line = rtrim(fgets($fp, 1024);
jcl atNOSPAM jcl dot name
23-Nov-2004 09:40
23-Nov-2004 09:40
Even better than 'plz at dont dot spam' in only one line :) :
@c:\\php\\cli\\php.exe script.php %*
Cheers,
Jean-Charles
plz at dont dot spam
08-Aug-2004 01:50
08-Aug-2004 01:50
To get all arguments passed to a batch file in one variable
rather than using %1 %2 %3 etc;
:LOOP
if "%1" == "" goto DONE
set args=%args% %1
shift
goto LOOP
:DONE
@c:\\php\\cli\\php.exe script.php %args%
set args=
ds at NOSPAM dot undesigned dot org dot za
04-Dec-2003 08:04
04-Dec-2003 08:04
You can open /dev/tty on unix systems or \con in windows, with ob_implicit_flush(true) to write output unbuffered. Works like a charm :-)
-------------------------------
#!/usr/local/bin/php -q
<?php
set_time_limit(0);
@ob_end_flush();
ob_implicit_flush(true);
class prompt {
var $tty;
function prompt() {
if (substr(PHP_OS, 0, 3) == "WIN") {
$this->tty = fOpen("\con", "rb");
} else {
if (!($this->tty = fOpen("/dev/tty", "r"))) {
$this->tty = fOpen("php://stdin", "r");
}
}
}
function get($string, $length = 1024) {
echo $string;
$result = trim(fGets($this->tty, $length));
echo "\n";
return $result;
}
}
echo "Enter something or 'exit' to quit\n";
do {
$cmdline = new prompt();
$buffer = $cmdline->get("Something: ");
echo "You said: $buffer\n";
} while ($buffer !== "exit");
echo "Goodbye\n";
?>
jewfish at jewfish dot net
10-Jun-2002 04:05
10-Jun-2002 04:05
There is a simpler way to do a multiline read than above:
function multiline() {
while(($in = readline("")) != ".")
$story .= ($PHP_OS == "WINNT") ? "\r\n".$in :
"\n".$in;
return $story;
}
joshua at neocodesoftware.com
21-Apr-2002 03:17
21-Apr-2002 03:17
Here's an example simple readline-like way to input from command line on windows - the single line is from http://www.phpbuilder.com/columns/darrell20000319.php3, the multiline is something I added...
<?
function read () {
# 4092 max on win32 fopen
$fp=fopen("php://stdin", "r");
$in=fgets($fp,4094);
fclose($fp);
# strip newline
(PHP_OS == "WINNT") ? ($read = str_replace("\r\n", "", $in)) : ($read = str_replace("\n", "", $in));
return $read;
}
function multilineread () {
do {
$in = read();
# test exit
if ($in == ".") return $read;
# concat input
(PHP_OS == "WINNT") ? ($read = $read . ($read ? "\r\n" : "") . $in) : ($read = $read . "\n" . $in);
} while ($inp != ".");
return $read;
}
print("End input with . on line by itself.\n");
print("What is your first name?\n");
$first_name = multilineread();
print("What is your last name?\n");
$last_name = read();
print("\nHello, $first_name $last_name! Nice to meet you! \n");
?>
14-Apr-2002 07:17
[Ed. note: you can use fopen("php://stdin", "w") to achieve the same thing, works on both Windows and Unix)]
I wanted to get console input in a PHP script running on windows, so I made a little hack, which is so simple, it is clearly public domain. What I did was write a C++ program to get a line, then output it. Then all that is needed is to exec() that program and capture the output - readline() for windows. The C++ source is as follows:
#include <iostream.h>
#include <string>
void main()
{
string input;
cin >> input;
cout << input;
}
It works wonderfully for my purposes, since I love the PHP language and want to have console input.
Justin Henck