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    Readline-Funktionen

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    User Contributed Notes 10 notes

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    4
    david at acz dot org
    17 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;
    }
    ?>
    up
    1
    flobee
    18 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";
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    1
    jcastromail at yahoo dot es
    2 years 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).
    up
    0
    jewfish at jewfish dot net
    22 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;
    }
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    0
    Anonymous
    22 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
    up
    -1
    jeffrey at thompsonic dot com
    19 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);
    up
    -1
    ds at NOSPAM dot undesigned dot org dot za
    20 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";

    ?>
    up
    -1
    jcl atNOSPAM jcl dot name
    19 years ago
    Even better than 'plz at dont dot spam' in only one line :) :

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

    Cheers,
    Jean-Charles
    up
    -1
    joshua at neocodesoftware.com
    22 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");
    ?>
    up
    -2
    plz at dont dot spam
    20 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=
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