PHP中的命令行进度条

Andrei Serdeliuc ॐ 37 php

我目前正在尝试向命令行脚本添加进度条,我尝试了各种解决方案(包括Zend和Console_ProgressBar).它们两者有共同的问题是进度条不会粘在窗口的底部,因为在脚本中,输出新行和其他信息.

有没有办法让进度条保持在终端的底部,但仍然能够在脚本运行时输出其他信息?

[编辑]

我想到了:

而不是直接输出到STDOUT我实际上是抓取变量内的输出,我擦除屏幕echo chr(27) . '[2J'然后输出到STDOUT变量的内容然后追加我的进度条.

希望有道理:)

user956584.. 78

这是cli很好的进度条:

http://snipplr.com/view/29548/

<?php

/*

Copyright (c) 2010, dealnews.com, Inc.
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
 * Neither the name of dealnews.com, Inc. nor the names of its contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

 */

/**
 * show a status bar in the console
 * 
 * <code>
 * for($x=1;$x<=100;$x++){
 * 
 *     show_status($x, 100);
 * 
 *     usleep(100000);
 *                           
 * }
 * </code>
 *
 * @param   int     $done   how many items are completed
 * @param   int     $total  how many items are to be done total
 * @param   int     $size   optional size of the status bar
 * @return  void
 *
 */

function show_status($done, $total, $size=30) {

    static $start_time;

    // if we go over our bound, just ignore it
    if($done > $total) return;

    if(empty($start_time)) $start_time=time();
    $now = time();

    $perc=(double)($done/$total);

    $bar=floor($perc*$size);

    $status_bar="\r[";
    $status_bar.=str_repeat("=", $bar);
    if($bar<$size){
        $status_bar.=">";
        $status_bar.=str_repeat(" ", $size-$bar);
    } else {
        $status_bar.="=";
    }

    $disp=number_format($perc*100, 0);

    $status_bar.="] $disp%  $done/$total";

    $rate = ($now-$start_time)/$done;
    $left = $total - $done;
    $eta = round($rate * $left, 2);

    $elapsed = $now - $start_time;

    $status_bar.= " remaining: ".number_format($eta)." sec.  elapsed: ".number_format($elapsed)." sec.";

    echo "$status_bar  ";

    flush();

    // when done, send a newline
    if($done == $total) {
        echo "\n";
    }

}

?>

  • 这是最好的答案 (2认同)
  • 非常如此.总而言之,该代码片段的重要部分是在写出新行之前回显出`"\ r"`(需要双引号). (2认同)
  • 该功能最糟糕的是,您通常使用$ c = 0而不是$ c = 1来启动for循环。由于您以$ c = 0开头,因此该函数会得到除以零的异常。 (2认同)

MacroMan.. 42

其他答案似乎过于复杂.我的解决方案是在下次更新之前简单地回显\ 033 [0G转义序列,它将光标移回到开头.

function progressBar($done, $total) {
    $perc = floor(($done / $total) * 100);
    $left = 100 - $perc;
    $write = sprintf("\033[0G\033[2K[%'={$perc}s>%-{$left}s] - $perc%% - $done/$total", "", "");
    fwrite(STDERR, $write);
}

首次调用该函数会输出进度条,每次后续调用都会用新的进度条覆盖最后一行.

编辑:我已经改变了回显\ r到转义序列\ 033 [0G,现在这应该适用于OSX以及Linux/Unix.

编辑2:根据@tbjers建议修正了第3行可能出现的错误.

编辑3:更新了新版本,打印到STDERR,现在也在GitHub上:https://github.com/MacroMan/PHPTerminalProgressBar