PHP - Manual: Readline 函数

2024-11-14

readline_add_history »

« 预定义常量

Readline 函数

readline_add_history — 添加一行命令行历史记录
readline_callback_handler_install — 初始化一个 readline 回调接口，然后终端输出提示信息并立即返回
readline_callback_handler_remove — 移除上一个安装的回调函数句柄并且恢复终端设置
readline_callback_read_char — 当一个行被接收时读取一个字符并且通知 readline 调用回调函数
readline_clear_history — 清除历史
readline_completion_function — 注册一个完成函数
readline_info — 获取/设置readline内部的各个变量
readline_list_history — 获取命令历史列表
readline_on_new_line — 通知readline将光标移动到新行
readline_read_history — 读取命令历史
readline_redisplay — 重绘显示区
readline_write_history — 写入历史记录
readline — 读取一行

add a note

User Contributed Notes 10 notes

down

david at acz dot org ¶

15 years ago


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;
    }
?>

down

flobee ¶

16 years ago


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";

down

jeffrey at thompsonic dot com ¶

17 years ago


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);

down

Anonymous ¶

20 years ago


[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

down

jcastromail at yahoo dot es ¶

4 months ago


Windows.
To the current date,  PHP 8.1 64bits under Windows does not support all the functions:

supported:
readline_add_history                                                                 
readline_clear_history                                                               
readline_completion_function                                                         
readline_info                                                                        
readline_list_history                                                                
readline_read_history                                                                
readline_write_history                                                               
readline    
                                                                         
no supported: (the function is not even defined)

readline_callback_handler_install
readline_callback_handler_remove
readline_callback_read_char
readline_on_new_line
readline_redisplay

if you want to read a key in windows (without blocking), you can use the next code:

$out='';
$ret='';
$keys='1234567890abcdefghijklmnopqrstuvwxyz'."á";
$default="á";
while(true) {
    exec("choice /N /C $keys /D $default /T 1",$out,$ret);
    if($out[0]!=="á") {
        var_dump($out[0]);
    }
    $out=[];
}

It is not elegant and it calls choice every 1 second but it does the job (at least with some keys).

down

jewfish at jewfish dot net ¶

20 years ago


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;
}

down

joshua at neocodesoftware.com ¶

20 years ago


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");
?>

down

-1

ds at NOSPAM dot undesigned dot org dot za ¶

18 years ago


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";

?>

down

-1

jcl atNOSPAM jcl dot name ¶

17 years ago


Even better than 'plz at dont dot spam' in only one line :) :

@c:\\php\\cli\\php.exe script.php %*

Cheers,
Jean-Charles

down

-2

plz at dont dot spam ¶

17 years ago


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=

add a note

官方地址：https://www.php.net/manual/en/ref.readline.php

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 开发编程科技 Elasticsearch HTML/CSS/XML 网络 JAVA NoSQL 数据库面试 C/C++ Golang Git 算法操作系统正则表达式 Redis 互联网 MySql JavaScript 运维软件国际架构设计 Mac OS TCP/IP Excel Vim Windows Socket Oracle VR MongoDB Python 运营 MemCache 商业硬件电子娱乐设计 nginx 摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 [PHP] inet_pton/inet_ntop IP地址转换函数 array_multisort() 多字段排序 PHPMailer设置utf8 PHPMailer字符集CharSet ADORecordSet对象 adodb手册 PHP 8.1 [鸟哥]PHP_INT_MIN 和 -9223372036854775808 opcache预加载 Composer的Packagist资源 mysql面试题 [鸟哥]PHP FFI详解 - 一种全新的PHP扩展方式 PHP7添加redis扩展 PHP mkdir()写出来的权限与mode值不符合 Packagist / Composer 中国全量镜像支持php7的性能采集扩展 php $_SERVER中的SERVER_NAME 和HTTP_HOST的区别 adodb连接mysql多个数据库的问题

略微加速

PHP官方手册 - 互联网笔记

Readline 函数

目录

User Contributed Notes 10 notes