PHP 中的命令行进度条

Question

我目前正在尝试向命令行脚本添加进度条，并且尝试了各种解决方案（包括 Zend 和 Console_ProgressBar）。它们的共同问题是进度条不会停留在窗口底部，因为在脚本运行期间，会输出新行和其他信息。

有什么方法可以让进度条保持在终端底部，但仍然能够在脚本运行时输出其他信息？

[编辑]

我想到了：

我实际上不是直接输出到 STDOUT，而是在变量中获取输出，而是使用 echo chr(27) . '[2J' 擦除屏幕，然后将变量的内容输出到 STDOUT，然后附加我的进度条。

希望这是有道理的:)

原文由 Andrei Serdeliuc ॐ 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

这是 cli 的不错的进度条：

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

 <?php

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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 PHP_EOL;
    }

}

?>

原文由 user956584 发布，翻译遵循 CC BY-SA 4.0 许可协议