Detailed explanation of the progress bar effect implemented in PHP

Detailed explanation of the progress bar effect implemented in PHP_php skills

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Release： 2016-05-16 19:53:34

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The example in this article describes the progress bar effect implemented in PHP. Share it with everyone for your reference, the details are as follows:
When doing collection, I wanted to implement a progress bar function through PHP. I googled it and found a suitable code. Directly enter the code below:

<&#63;php
//防止执行超时
set_time_limit(0);
//清空并关闭输出缓存
ob_end_clean();
//需要循环的数据
for($i = 0; $i < 188; $i++)
{
  $users[] = 'Tom_' . $i;
}
//计算数据的长度
$total = count($users);
//显示的进度条长度，单位 px 
$width = 500;
//每条记录的操作所占的进度条单位长度
$pix = $width / $total;
//默认开始的进度条百分比
$progress = 0;
&#63;>
<html>
<head>
<title>动态显示服务器运行程序的进度条</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style>
body,div input {
  font-family: Tahoma;
  font-size: 9pt
}
</style>
<script language="JavaScript">
 <!-- 
 function updateProgress(sMsg, iWidth) 
 { 
  document.getElementById("status").innerHTML = sMsg; 
  document.getElementById("progress").style.width = iWidth + "px"; 
  document.getElementById("percent").innerHTML = parseInt(iWidth / <&#63;php echo $width; &#63;> * 100) + "%"; 
  } 
 --> 
 </script>
</head>
<body>
  <div style="margin:50px auto; padding: 8px; border: 1px solid gray; background: #EAEAEA; width: <&#63;php echo $width+8; &#63;>px">
    <div style="padding: 0; background-color: white; border: 1px solid navy; width: <&#63;php echo $width; &#63;>px">
      <div id="progress"
        style="padding: 0; background-color: #FFCC66; border: 0; width: 0px; text-align: center; height: 16px"></div>
    </div>
    <div id="status"></div>
    <div id="percent"
      style="position: relative; top: -30px; text-align: center; font-weight: bold; font-size: 8pt">0%</div>
  </div> 
<&#63;php
flush(); //将输出发送给客户端浏览器 
foreach($users as $user)
{
  // 在此处使用空循环模拟较为耗时的操作，实际应用中需将其替换； 
  // 如果你的操作不耗时，我想你就没必要使用这个脚本了 :) 
  for($i = 0; $i < 1000000; $i++)
  {
  }
  &#63;> 
<script language="JavaScript"> 
 updateProgress("正在操作用户 <&#63;php echo $user; &#63;> ....", <&#63;php echo min($width, intval($progress)); &#63;>);
</script>
<&#63;php
  flush(); //将输出发送给客户端浏览器，使其可以立即执行服务器端输出的 JavaScript 程序。 
  $progress += $pix;
} //end foreach 
&#63;> 
<script language="JavaScript"> 
  //最后将进度条设置成最大值 $width，同时显示操作完成 
 updateProgress("操作完成！", <&#63;php echo $width; &#63;>); 
</script>
<&#63;php
flush();
&#63;>
</body>
</html>

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