Bootstrap 上传到服务器时进度条显示为空

Question

有谁知道为什么我上传文件时这些进度条显示为空？我之前用过它们并且它们工作正常，虽然现在我正在使用数据库中的数据，但它们不起作用？

$count1 = 10;
$count2 = 14;
$count3 = 18;
$count4 = 22;

<div class="panel-body">
                       <div class="progress progress-striped">
  <div class="progress-bar progress-bar-success" role="progressbar" aria-valuenow="40" aria-valuemin="0" aria-valuemax="100" value="<? echo $count1; ?>">
    <span class="sr-only">40% Complete (success)</span>
  </div>
</div>
<div class="progress progress-striped">
  <div class="progress-bar progress-bar-info" role="progressbar" aria-valuenow="20" aria-valuemin="0" aria-valuemax="100" value="<? echo $count2; ?>">
    <span class="sr-only">20% Complete</span>
  </div>
</div>
<div class="progress progress-striped">
  <div class="progress-bar progress-bar-warning" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" value="<? echo $count3; ?>">
    <span class="sr-only">60% Complete (warning)</span>
  </div>
</div>
<div class="progress progress-striped">
  <div class="progress-bar progress-bar-danger" role="progressbar" aria-valuenow="80" aria-valuemin="0" aria-valuemax="100" value="<? echo $count4; ?>">
    <span class="sr-only">80% Complete</span>
  </div>
</div>
</div>

Answer 1

您的 div

中似乎缺少样式宽度属性

尝试替换：

value="<? echo $count2; ?>">

与：

style="width: <? echo $count2; ?>%"

您在这里所做的 value 将不起作用。

Answer 2

你也必须设置宽度属性：

<div class="progress">
  <div class="progress-bar" role="progressbar" aria-valuenow="<? echo $count1 ?>" aria-valuemin="0" aria-valuemax="100" style="width: <?= echo $count1 ?>%;">
    <span class="sr-only">60% Complete</span>
  </div>
</div>

Bootstrap 上传到服务器时进度条显示为空

Bootstrap progress bars show empty when uploaded to server

html

php

progress-bar