PHP execution progress percentage code

PHP execution progress percentage code

 <?php
session_start();
$zs=21;//设置任务总数
if(!isset($_SESSION[&#39;num&#39;]))
$_SESSION[&#39;num&#39;]=$zs;//赋予session变量值
$jd=$_SESSION[&#39;num&#39;]--;//进度值
echo $jd;//显示进度值
echo "
";
echo 100-round($jd/$zs*100)."%";//显示完成进度百分比
?>

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